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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="background-color: white"><B>As
filed with the Securities and Exchange Commission on April 10, 2018</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: right"><B>Registration No. 333- </B></P>

<P STYLE="font: 2pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

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<P STYLE="font: 2pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 2pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>UNITED STATES </B></P>

<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>SECURITIES AND EXCHANGE COMMISSION</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>Washington, D.C.&nbsp;&nbsp;20549</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>__________________</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 14pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>FORM S-8</B></P>

<P STYLE="font: 14pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>REGISTRATION STATEMENT </B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>UNDER THE SECURITIES ACT OF 1933</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>_________________</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 18pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>SOLITARIO ZINC CORP.</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><I>(Exact Name of Registrant as Specified in
Its Charter)</I></P>

<P STYLE="font: 8pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 48%; font: 10pt Times New Roman, Times, Serif; text-align: center"><B>Colorado</B></TD>
    <TD STYLE="width: 52%; font: 10pt Times New Roman, Times, Serif; text-align: center"><B>84-1285791</B></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center"><I>(State of incorporation)</I></TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><I>(I.R.S. Employer Identification No.)</I></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><I>&nbsp;</I></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><I>&nbsp;</I></P></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>4251 Kipling Street, Suite 390</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>Wheat Ridge, Colorado 80033</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>(303) 534-1030</B></P>

<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0; text-align: center">(Address of Principal Executive Offices)</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>_____________________</B></P>

<P STYLE="font: 8pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>2013 Solitario Zinc Corp. </B></P>

<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>Omnibus Stock and Incentive Plan</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><I>(Full Title of the Plan)</I></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B><I>_______________________</I></B><BR>
<BR>
</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>James Maronick, Chief Financial Officer </B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>4251 Kipling Street, Suite 390 </B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>Wheat Ridge, Colorado 80033 </B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><I>(Name and address of agent for service)</I></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>(303) 534-1030 </B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><I>(Telephone number, including area code, of
agent for service)</I></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><I>_________________</I></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><I>Copies to:</I></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center">Darren R. Hensley, Esq.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center">Peter F. Waltz, Esq.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center">Polsinelli PC</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center">1401 Lawrence, Suite 2300</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center">Denver, Colorado 80220</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center">(303) 572-9300 (phone); (303) 572-7883 (fax)</P>

<P STYLE="font: 8pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 9pt Times New Roman, Times, Serif; margin: 0">Indicate by check mark whether the registrant is a large accelerated
filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growth company. See the definitions
of &#8220;large accelerated filer,&#8221; &#8220;accelerated filer,&#8221; &#8220;smaller reporting company&#8221; and &#8220;emerging
growth company&#8221; in Rule 12b-2 of the Exchange Act. (Check one):</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; border-collapse: collapse">
<TR STYLE="background-color: white">
    <TD STYLE="vertical-align: top; width: 58%; font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-size: 9pt">Large accelerated filer <FONT STYLE="font-family: MS Mincho">&#9744;</FONT></FONT></TD>
    <TD STYLE="vertical-align: bottom; width: 5%; font: 10pt Times New Roman, Times, Serif">&nbsp;</TD>
    <TD STYLE="vertical-align: top; width: 37%; font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-size: 9pt">Accelerated filer <FONT STYLE="font-family: MS Mincho">&#9744;</FONT></FONT></TD></TR>
<TR STYLE="background-color: white">
    <TD STYLE="vertical-align: top; font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-size: 9pt">Non-accelerated filer <FONT STYLE="font-family: MS Mincho">&#9744; </FONT>(Do not check if a smaller reporting company)</FONT></TD>
    <TD STYLE="vertical-align: bottom; font: 10pt Times New Roman, Times, Serif">&nbsp;</TD>
    <TD STYLE="vertical-align: top">
        <P STYLE="font: 9pt Times New Roman, Times, Serif; margin: 0">Smaller reporting company <FONT STYLE="font-family: MS Mincho">&#9746;</FONT></P>
        <P STYLE="font: 9pt Times New Roman, Times, Serif; margin: 0">Emerging growth company <FONT STYLE="font-family: MS Mincho">&#9744;</FONT></P></TD></TR>
</TABLE>
<P STYLE="font: 8pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>




<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>CALCULATION OF REGISTRATION FEE</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: bottom">
    <TD STYLE="text-align: center"><FONT STYLE="font-size: 9pt"><B>Title of Securities to be Registered</B></FONT></TD>
    <TD>&nbsp;</TD>
    <TD COLSPAN="2" STYLE="text-align: center"><FONT STYLE="font-size: 9pt"><B>Amount to be Registered<FONT STYLE="font-family: Times New Roman, Times, Serif"><SUP>(1)</SUP></FONT></B></FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: center"><FONT STYLE="font-size: 9pt"><B>Proposed Maximum Offering Price Per Share<FONT STYLE="font-family: Times New Roman, Times, Serif"><SUP>(2)</SUP></FONT></B></FONT></TD>
    <TD STYLE="text-align: center"><FONT STYLE="font-size: 9pt"><B>Proposed Maximum Aggregate Offering Price<FONT STYLE="font-family: Times New Roman, Times, Serif"><SUP>(2)</SUP></FONT></B></FONT></TD>
    <TD STYLE="text-align: center"><FONT STYLE="font-size: 9pt"><B>Amount of Registration Fee<FONT STYLE="font-family: Times New Roman, Times, Serif"><SUP>(2)</SUP></FONT></B></FONT></TD></TR>
<TR STYLE="vertical-align: bottom; background-color: #CCEEFF">
    <TD STYLE="width: 28%">Common stock, par value $0.01 per share</TD>
    <TD STYLE="width: 1%; padding-bottom: 3.3pt">&nbsp;</TD>
    <TD STYLE="width: 2%">&nbsp;</TD>
    <TD STYLE="width: 8%; text-align: right">4,000,000</TD>
    <TD STYLE="width: 1%; padding-bottom: 3.3pt">&nbsp;</TD>
    <TD STYLE="width: 20%; text-align: center">$0.46</TD>
    <TD STYLE="width: 20%; text-align: center">$1,820,000</TD>
    <TD STYLE="width: 20%; text-align: center">$227</TD></TR>
<TR>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
</TABLE>
<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">(1)<B>&nbsp;</B>Consists of shares of common
stock, $0.01 par value per share of the Registrant, or common stock, authorized for issuance under the Solitario Zinc Corp., 2013
Solitario Zinc Corp. Omnibus Stock and Incentive Plan, as amended (the &#8220;<B>Plan</B>&#8221;). Pursuant to Rule 416 of the
Securities Act of 1933, as amended (the &#8220;<B>Securities Act</B>&#8221;), this registration statement also covers any additional
shares of common stock which become issuable under the above-named plan by reason of any share dividend, share split, recapitalization
or any other similar transaction without receipt of consideration which results in an increase in the number of shares or common
stock outstanding.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">(2)&nbsp;&nbsp;The proposed maximum aggregate
offering price of the Registrant&#8217;s common stock was calculated based upon the market value for shares of the common stock
in accordance with Rule&nbsp;457(c) and (h) under the Securities Act using the average of the high and low sales prices on the
NYSE American Stock Exchange on&nbsp;April 6, 2018 per share of the common stock of the Registrant.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>




<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center">&nbsp;<BR STYLE="clear: both">
</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center">&nbsp;</P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center; background-color: white"><B>Explanatory Note</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center; background-color: white"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in; background-color: white">This
Registration Statement on Form&nbsp;S&#45;8 is filed pursuant to General Instruction&nbsp;E to Form&nbsp;S&#45;8 for the purpose
of registering an additional 4,000,000 shares of common stock, par value $0.01 per share, of Solitario Zinc Corp. (the &#8220;<B>Company</B>&#8221;)
which may be issued pursuant to awards under the Plan.&nbsp; In accordance with General Instruction&nbsp;E to Form&nbsp;S&#45;8,
the Company incorporates herein by reference the contents of the registration statement on Form&nbsp;S&#45;8 filed by the Company
with respect to the Plan on August&nbsp;1, 2013 (Registration No.&nbsp;333-190304) together with all exhibits filed therewith or
incorporated therein by reference to the extent not otherwise amended or superseded by the contents hereof.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>PART&nbsp;I</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>INFORMATION REQUIRED IN THE SECTION&nbsp;10(a)&nbsp;PROSPECTUS</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">The information specified
in Item&nbsp;1 and Item&nbsp;2 of this Part&nbsp;I is omitted in accordance with the provisions of Rule&nbsp;428 under the Securities
Act and the introductory note to Part&nbsp;I of Form S-8. The document(s) containing the information specified in this Part I will
be sent or given to participants in the 2013 Solitario Exploration &amp; Royalty Corp. Omnibus Stock and Incentive Plan in accordance
with Rule 428(b)(1) under the Securities Act. Such documents need not be filed with the Securities and Exchange Commission (the
&#8220;<B>SEC</B>&#8221;) either as part of this Registration Statement or as prospectuses or prospectus supplements pursuant to
Rule 424 promulgated under the Securities Act. These document(s) and the documents incorporated by reference in this Registration
Statement pursuant to Item&nbsp;3 of Part II of this Form S-8, taken together, constitute a prospectus that meets the requirements
of Section&nbsp;10(a) of the Securities Act.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>PART II</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>INFORMATION REQUIRED IN THE REGISTRATION
STATEMENT</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><B>ITEM 3.&nbsp;&nbsp;INCORPORATION OF DOCUMENTS BY REFERENCE.</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">The SEC allows us to incorporate
by reference information into this Registration Statement. This means we can disclose information to you by referring you to another
document we filed with the SEC. We will make those documents available to you without charge upon your oral or written request.
Requests for those documents should be directed to Solitario Zinc Corp. 4251 Kipling Street, Suite 390, Wheat Ridge, Colorado 80033,
Attention: Corporate Secretary, telephone: (303) 534-1030. This Registration Statement incorporates by reference the following
documents that we have filed with the SEC but have not included or delivered with this Registration Statement:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 100%; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Annual
    Report on Form 10-K for the fiscal year ended December 31, 2017 and filed on March 14, 2018; and</FONT></TD></TR>
<TR>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; padding-left: 0.25in; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">The description
    of our common stock contained in our registration statement on Form 8-A, which was filed with the SEC on August 9, 2006, including
    any amendment or report filed for the purpose of updating such description.</FONT></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">We are also incorporating
by reference all documents filed by the Registrant pursuant to Sections&nbsp;13(a), 13(c), 14 and 15(d) of the Securities Exchange
Act of 1934, as amended, after the date of this Registration Statement and prior to the filing of a post-effective amendment to
this Registration Statement which indicates that all securities offered have been sold or which deregisters all securities then
remaining unsold, other than any portion of the respective filings furnished, rather than filed, under the applicable SEC rules.
The additional information incorporated by reference is a part of this Registration Statement from the date of filing of those
documents.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">Any statement
contained in a document incorporated by, or deemed incorporated by reference herein, shall be deemed to be modified or
superseded for purposes of this Registration Statement to the extent that a statement contained herein or in any other
subsequently filed document which also is or is deemed to be incorporated by reference herein modifies or supersedes such
statement. Any statement so modified or superseded shall not be deemed, except as so modified or superseded, to constitute a
part of this Registration Statement.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">The information relating
to us contained in this Registration Statement should be read together with the information in the documents incorporated by reference.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 0 0.5in; text-indent: -0.5in"><FONT STYLE="text-transform: uppercase"><B>Item
4.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Description of Securities.</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 0 0.5in; text-indent: -0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
Not applicable.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 0 0.5in; text-indent: -0.5in"><FONT STYLE="text-transform: uppercase"><B>Item
5.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Interests of Named Experts and Counsel.</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 0 0.5in; text-indent: -0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in">Not applicable.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 0 0.5in; text-indent: -0.5in"><FONT STYLE="text-transform: uppercase"><B>Item
6.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Indemnification of Directors and Officers.</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 0 0.5in; text-indent: -0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">The Colorado Business Corporation
Act allows a corporation to indemnify its directors, officers, employees, fiduciaries and agents against liability in certain situations.
Our Articles of Incorporation authorize us to indemnify our directors to the fullest extent permitted by Colorado law.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">Under the Colorado Business
Corporation Act indemnification would be mandatory with respect to a director or officer who was wholly successful in defense of
an action, suit or proceeding. As permitted by the Colorado Business Corporation Act and our By-laws, we will indemnify directors
and officers, and may indemnify employees, fiduciaries and agents, against reasonably incurred expenses, judgments, penalties,
fines and amounts paid in settlement reasonably incurred by them in connection with an action, suit or proceeding if it is determined
that they conducted themselves in good faith and that they reasonably believed (i) in the case of conduct in their official capacity,
that their conduct was in the company&#8217;s best interests, or (ii) in all other cases (except criminal cases), that their conduct
was at least not opposed to the company&#8217;s best interests, or (iii) in the case of a criminal proceeding, that they had no
reasonable cause to believe their conduct was unlawful. In proceedings brought by or in the right of the Company, indemnification
will be limited to reasonable expenses incurred in connection with the proceeding. No indemnification will be provided with respect
to any claim, issue or matter in connection with a proceeding by or in the right of the Company in which the person was adjudged
to be liable to the Company on in any proceeding charging that the person derived an improper personal benefit, whether or not
involving action in an official capacity, in which they were adjudged to be liable to the Company on the basis that they derived
an improper personal benefit. Additional indemnification may be provided to officers, employees, fiduciaries or agents if they
are not also directors, so long as such additional indemnification is provided for by general or specific action by the board of
directors or stockholders or by contract and would not be inconsistent with public policy.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">Section 7-109-108 of the
Colorado Business Corporation Act provides that a corporation shall have the power to purchase and maintain insurance on behalf
of its officers, directors, employees, fiduciaries and agents, against any liability asserted against and incurred by such persons
in any such capacity.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">Section 7-108-403 of the
Colorado Business Corporation Act provides, among other things, that a director, who votes for or assents to an unlawful payment
of dividends or an unlawful stock purchase or redemption, may be held liable for such actions.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">Section 7-108-402 of the
Colorado Business Corporation Act allows a Colorado corporation to eliminate or limit the personal liability of a director to the
corporation or to its shareholders for monetary damages for a breach of fiduciary duty as a director, except for liabilities arising
from any breach of the director&#8217;s duty of loyalty to the corporation or its shareholders, from acts or omissions not in good
faith or which involve intentional misconduct or a knowing violation of law, from any transaction from which the director derived
an improper personal benefit, or from any other act, omission or transaction as to which the Colorado Business Corporation Act
prohibits the elimination or limitation of liability. Our Articles of Incorporation contain a provision limiting director liability
for monetary damages for his or her conduct as a director.</P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"></P>




<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">Our directors and officers
are covered by insurance policies maintained by us against specified liabilities for actions taken in their capacities as such,
including liabilities under the Securities Act of 1933.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 0 0.5in; text-indent: -0.5in"><FONT STYLE="text-transform: uppercase"><B>&nbsp;</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 0 0.5in; text-indent: -0.5in"><FONT STYLE="text-transform: uppercase"><B>Item
7.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Exemption from Registration Claimed.</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in">Not applicable.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><B>ITEM 8.&nbsp;&nbsp;EXHIBITS.</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in">The exhibits to this registration statement
are listed in the Exhibit Index that immediately precedes such exhibits and is incorporated herein by reference.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 0 0.5in; text-indent: -0.5in"><FONT STYLE="text-transform: uppercase"><B>Item
9.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Undertakings.</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 0 0.5in; text-indent: -0.5in">&nbsp;&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">A. The undersigned registrant hereby undertakes:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 31.5pt">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 36pt"></TD><TD STYLE="width: 27pt">(1)</TD><TD STYLE="text-align: justify">To file, during any period in which offers or sales are being made, a post-effective amendment
to this Registration Statement:</TD></TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 63pt"></TD><TD STYLE="width: 36pt">(i)</TD><TD STYLE="text-align: justify">to include any prospectus required by Section 10(a)(3) of the Securities Act;</TD></TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 0 99pt; text-align: justify">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 63pt"></TD><TD STYLE="width: 36pt">(ii)</TD><TD STYLE="text-align: justify">to reflect in the prospectus any facts or events arising after the effective date of the Registration
Statement (or the most recent post-effective amendment thereof) which, individually or in the aggregate, represent a fundamental
change in the information set forth in the Registration Statement. Notwithstanding the foregoing, any increase or decrease in volume
of securities offered (if the total dollar value of securities offered would not exceed that which was registered) and any deviation
from the low or high end of the estimated maximum offering range may be reflected in the form of prospectus filed with the SEC
pursuant to Rule&nbsp;424(b) if, in the aggregate, the changes in volume and price represent no more than 20% change in the maximum
aggregate offering price set forth in the &#8220;Calculation of Registration Fee&#8221; table in the effective registration statement;
and</TD></TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 0 99pt; text-align: justify; text-indent: -0.5in">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 63pt"></TD><TD STYLE="width: 36pt">(iii)</TD><TD STYLE="text-align: justify">to include any material information with respect to the plan of distribution not previously disclosed
in the Registration Statement or any material change to such information in the Registration Statement;</TD></TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><I>provided, however</I>, that paragraphs (1)(i)
and (1)(ii) above do not apply if information required to be included in a post-effective amendment by those paragraphs is contained
in reports filed with or furnished to the SEC by the Registrant pursuant to Section&nbsp;13 or Section&nbsp;15(d) of the Exchange
Act that are incorporated by reference in the Registration Statement;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 36pt"></TD><TD STYLE="width: 27pt">(2)</TD><TD STYLE="text-align: justify">That, for the purpose of determining any liability under the Securities Act, each such post-effective
amendment shall be deemed to be a new Registration Statement relating to the securities offered therein, and the offering of such
securities at that time shall be deemed to be the initial bona fide offering thereof.</TD></TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 0 63pt; text-align: justify; text-indent: -27pt">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 36pt"></TD><TD STYLE="width: 27pt">(3)</TD><TD STYLE="text-align: justify">To remove from registration by means of a post-effective amendment any of the securities being
registered which remain unsold at the termination of the offering.</TD></TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">B. The undersigned Registrant hereby undertakes
that, for purposes of determining any liability under the Securities Act, each filing of the Registrant&#8217;s annual report pursuant
to Section&nbsp;13(a) or 15(d) of the Exchange Act, (and, where applicable, each filing of an employee benefit plan&#8217;s annual
report pursuant to Section&nbsp;15(d) of the Exchange Act) that is incorporated by reference in the Registration Statement shall
be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at
that time shall be deemed to be the initial bona fide offering thereof.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">C. Insofar as indemnification for liabilities
arising under the Securities Act may be permitted to directors, officers and controlling persons of the registrant pursuant to
the foregoing provisions, or otherwise, the Registrant has been advised that in the opinion of the SEC such indemnification is
against public policy as expressed in the Securities Act and is, therefore, unenforceable. In the event that a claim for indemnification
against such liabilities (other than the payment by the Registrant of expenses incurred or paid by a director, officer or controlling
person of the Registrant in the successful defense of any action, suit or proceeding) is asserted by such director, officer or
controlling person in connection with the securities being registered, the Registrant will, unless in the opinion of its counsel
the matter has been settled by controlling precedent, submit to a court of appropriate jurisdiction the question whether such
indemnification by it is against public policy as expressed in the Securities Act and will be governed by the final adjudication
of such issue.</P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"></P>




<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center">&nbsp;<BR STYLE="clear: both">
<B>SIGNATURES</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 19.8pt">Pursuant to the requirements
of the Securities Act of 1933, Solitario Zinc Corp., certifies that it has reasonable grounds to believe that it meets all of the
requirements for filing on Form S-8 and has duly caused this Registration Statement to be signed on its behalf by the undersigned,
thereunto duly authorized, in Wheat Ridge, Colorado on April 10, 2018.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 19.8pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&#9;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 19.8pt"><B>&#9;SOLITARIO ZINC
CORP.</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 19.8pt">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 0 3.85in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 0 2.75in; text-indent: 0.5in">By: <U>&#9;/s/ Christopher E. Herald&#9;</U></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 0 3in; text-indent: 0.5in">Name: Christopher E. Herald</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 0 280.35pt; text-indent: -28.35pt">Title: President and Chief Executive
Officer</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 24.5pt">Each of the undersigned
whose signature appears below hereby constitutes and appoints Christopher E. Herald or James R. Maronick and each of them acting
alone, his true and lawful attorneys-in-fact and agents, with full power of substitution and resubstitution, for him and in his
name, place and stead, in any and all capacities, to sign any and all amendments (including post-effective amendments) to this
Registration Statement, and any registration statement relating to the offering covered by this Registration Statement and filed
pursuant to Rule 462(b) under the Securities Act of 1933, and to file the same, with all exhibits thereto, and other documents
in connection therewith, with the Securities Exchange Commission, under the Securities Act of 1933, granting unto said attorneys-in-fact
and agents, and each of them, full power and authority to do and perform each and every act and thing requisite and necessary to
be done, as fully to all intents and purposes as he or she might or could do in person, hereby ratifying and confirming all that
each of said attorneys-in-fact and agents or their substitute or substitutes may lawfully do or cause to be done by virtue hereof.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 24.5pt">Pursuant to the requirements of the Securities
Act of 1933, this Registration Statement has been signed by the following persons in the capacities and on the date indicated.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; background-color: white">
<TR>
    <TD NOWRAP STYLE="vertical-align: bottom; width: 27%; text-align: center"><B><U>Signature</U></B></TD>
    <TD NOWRAP STYLE="vertical-align: bottom; width: 46%; text-align: center"><B><U>Title(s)</U></B></TD>
    <TD STYLE="vertical-align: top; width: 27%; text-align: center"><B><U>Date</U></B></TD></TR>
<TR>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><U>/s/ <FONT STYLE="font-family: inherit,serif">Christopher E. Herald</FONT></U></P>
        <P STYLE="font: 10pt inherit,serif; margin: 0">Christopher E. Herald</P></TD>
    <TD STYLE="text-align: center">President, Chief Executive Officer and Director<BR>
(Principal Executive Officer)</TD>
    <TD STYLE="text-align: center">April 10, 2018</TD></TR>
<TR>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><U>/s/ <FONT STYLE="font-family: inherit,serif">James R. Maronick
        </FONT></U></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">James R. Maronick</P></TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center">Chief Financial Officer<BR>
        (Principal Financial Officer and Principal Accounting Officer)</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center">&nbsp;</P></TD>
    <TD STYLE="text-align: center">April 10, 2018</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><U>/s/ John Labate </U></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">John Labate</P></TD>
    <TD STYLE="text-align: center">Director </TD>
    <TD STYLE="text-align: center">April 10, 2018</TD></TR>
<TR>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><U>/s/ Brian Labadie&#9; </U></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">Brian Labadie</P></TD>
    <TD NOWRAP STYLE="text-align: center">Director</TD>
    <TD STYLE="text-align: center">April 10, 2018</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD NOWRAP STYLE="text-align: center">&nbsp;</TD>
    <TD STYLE="text-align: center">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><U>/s/ James Hesketh </U></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">James Hesketh</P></TD>
    <TD NOWRAP STYLE="text-align: center">Director </TD>
    <TD STYLE="text-align: center">April 10, 2018</TD></TR>
<TR>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><U>/s/ Gil Atzmon </U></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">Gil Atzmon</P></TD>
    <TD NOWRAP STYLE="text-align: center">Director </TD>
    <TD STYLE="text-align: center">April 10, 2018</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD NOWRAP STYLE="text-align: center">&nbsp;</TD>
    <TD STYLE="text-align: center">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><U>/s/ Joshua D. Crumb</U></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">Joshua D. Crumb</P></TD>
    <TD NOWRAP STYLE="text-align: center">Director</TD>
    <TD STYLE="text-align: center">April 10, 2018</TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>


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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>EXHIBIT INDEX</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>&nbsp;</B></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; border-collapse: collapse">
<TR STYLE="vertical-align: bottom">
    <TD COLSPAN="2">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
<TR>
    <TD COLSPAN="2" STYLE="text-align: center"><B><U>Exhibit No.</U></B></TD>
    <TD STYLE="padding-bottom: 1.1pt"><B>&nbsp;</B></TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B><U>Exhibit Description</U></B></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 3%">&nbsp;</TD>
    <TD STYLE="width: 8%">4.1</TD>
    <TD STYLE="width: 1%">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P></TD>
    <TD STYLE="width: 88%">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">2013 Solitario Exploration &amp; Royalty Corp.
        Omnibus Stock and Incentive Plan, incorporated by reference to Exhibit 99.1 to the Company&#8217;s Form 8-K filed on June 20, 2013.</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>4.2</TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">First Amendment to the 2013 Solitario Exploration &amp; Royalty
        Corp. Omnibus Stock and Incentive Plan (incorporated by reference to Exhibit 10.1 to Solitario&#8217;s Form 8-K filed on June 29,
        2017)</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>4.3</TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">Form of Common Stock Certificate of Solitario Zinc Corp. (incorporated
        by reference to Exhibit 4.1 to Solitario&#8217;s Form 10-Q filed on November 8, 2017)</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>5.1 </TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">Opinion of Polsinelli PC, filed herewith</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>23.1 </TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">Consent of EKSH LLLP, filed herewith</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>23.2 </TD>
    <TD>&nbsp;</TD>
    <TD>Consent of Polsinelli PC (included as part of Exhibit 5.1 of this Registration Statement)</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>24.1 </TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">Power of Attorney (included on signature page of this Registration
        Statement)</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P></TD></TR>
</TABLE>
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{"company-data": {"conformed-name": "SOLITARIO ZINC CORP.", "cik": "0000917225", "assigned-sic": "1040", "irs-number": "841285791", "state-of-incorporation": "CO", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "S-8", "act": "33", "file-number": "333-224224", "film-number": "18748530"}, "business-address": {"street1": "4251 KIPLING STREET", "street2": "SUITE 390", "city": "WHEAT RIDGE", "state": "CO", "zip": "80033", "phone": "3035341030"}, "mail-address": {"street1": "4251 KIPLING STREET", "street2": "SUITE 390", "city": "WHEAT RIDGE", "state": "CO", "zip": "80033"}, "former-company": [{"former-conformed-name": "SOLITARIO EXPLORATION & ROYALTY CORP.", "date-changed": "20080616"}, {"former-conformed-name": "SOLITARIO RESOURCES CORP", "date-changed": "20000711"}]}
As
filed with the Securities and Exchange Commission on April 10, 2018
Registration No. 333-
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C.  20549
__________________
FORM S-8
REGISTRATION STATEMENT
UNDER THE SECURITIES ACT OF 1933
_________________
SOLITARIO ZINC CORP.
(Exact Name of Registrant as Specified in
Its Charter)
Colorado
84-1285791
(State of incorporation)
(I.R.S. Employer Identification No.)
4251 Kipling Street, Suite 390
Wheat Ridge, Colorado 80033
(303) 534-1030
(Address of Principal Executive Offices)
_____________________
2013 Solitario Zinc Corp.
Omnibus Stock and Incentive Plan
(Full Title of the Plan)
_______________________
James Maronick, Chief Financial Officer
4251 Kipling Street, Suite 390
Wheat Ridge, Colorado 80033
(Name and address of agent for service)
(303) 534-1030
(Telephone number, including area code, of
agent for service)
_________________
Copies to:
Darren R. Hensley, Esq.
Peter F. Waltz, Esq.
Polsinelli PC
1401 Lawrence, Suite 2300
Denver, Colorado 80220
(303) 572-9300 (phone); (303) 572-7883 (fax)
Indicate by check mark whether the registrant is a large accelerated
filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growth company. See the definitions
of "large accelerated filer," "accelerated filer," "smaller reporting company" and "emerging
growth company" in Rule 12b-2 of the Exchange Act. (Check one):
Large accelerated filer
☐
Accelerated filer
☐
Non-accelerated filer
☐
(Do not check if a smaller reporting company)
Smaller reporting company
☒
Emerging growth company
☐
1
CALCULATION OF REGISTRATION FEE
Title of Securities to be Registered
Amount to be Registered
(1)
Proposed Maximum Offering Price Per Share
(2)
Proposed Maximum Aggregate Offering Price
(2)
Amount of Registration Fee
(2)
Common stock, par value $0.01 per share
4,000,000
$0.46
$1,820,000
$227
(1)
Consists of shares of common
stock, $0.01 par value per share of the Registrant, or common stock, authorized for issuance under the Solitario Zinc Corp., 2013
Solitario Zinc Corp. Omnibus Stock and Incentive Plan, as amended (the "
Plan
"). Pursuant to Rule 416 of the
Securities Act of 1933, as amended (the "
Securities Act
"), this registration statement also covers any additional
shares of common stock which become issuable under the above-named plan by reason of any share dividend, share split, recapitalization
or any other similar transaction without receipt of consideration which results in an increase in the number of shares or common
stock outstanding.
(2)  The proposed maximum aggregate
offering price of the Registrant's common stock was calculated based upon the market value for shares of the common stock
in accordance with Rule 457(c) and (h) under the Securities Act using the average of the high and low sales prices on the
NYSE American Stock Exchange on April 6, 2018 per share of the common stock of the Registrant.
2
Explanatory Note
This
Registration Statement on Form S-8 is filed pursuant to General Instruction E to Form S-8 for the purpose
of registering an additional 4,000,000 shares of common stock, par value $0.01 per share, of Solitario Zinc Corp. (the "
Company
")
which may be issued pursuant to awards under the Plan.  In accordance with General Instruction E to Form S-8,
the Company incorporates herein by reference the contents of the registration statement on Form S-8 filed by the Company
with respect to the Plan on August 1, 2013 (Registration No. 333-190304) together with all exhibits filed therewith or
incorporated therein by reference to the extent not otherwise amended or superseded by the contents hereof.
PART I
INFORMATION REQUIRED IN THE SECTION 10(a) PROSPECTUS
The information specified
in Item 1 and Item 2 of this Part I is omitted in accordance with the provisions of Rule 428 under the Securities
Act and the introductory note to Part I of Form S-8. The document(s) containing the information specified in this Part I will
be sent or given to participants in the 2013 Solitario Exploration & Royalty Corp. Omnibus Stock and Incentive Plan in accordance
with Rule 428(b)(1) under the Securities Act. Such documents need not be filed with the Securities and Exchange Commission (the
"
SEC
") either as part of this Registration Statement or as prospectuses or prospectus supplements pursuant to
Rule 424 promulgated under the Securities Act. These document(s) and the documents incorporated by reference in this Registration
Statement pursuant to Item 3 of Part II of this Form S-8, taken together, constitute a prospectus that meets the requirements
of Section 10(a) of the Securities Act.
PART II
INFORMATION REQUIRED IN THE REGISTRATION
STATEMENT
ITEM 3.  INCORPORATION OF DOCUMENTS BY REFERENCE.
The SEC allows us to incorporate
by reference information into this Registration Statement. This means we can disclose information to you by referring you to another
document we filed with the SEC. We will make those documents available to you without charge upon your oral or written request.
Requests for those documents should be directed to Solitario Zinc Corp. 4251 Kipling Street, Suite 390, Wheat Ridge, Colorado 80033,
Attention: Corporate Secretary, telephone: (303) 534-1030. This Registration Statement incorporates by reference the following
documents that we have filed with the SEC but have not included or delivered with this Registration Statement:
Annual
    Report on Form 10-K for the fiscal year ended December 31, 2017 and filed on March 14, 2018; and
The description
    of our common stock contained in our registration statement on Form 8-A, which was filed with the SEC on August 9, 2006, including
    any amendment or report filed for the purpose of updating such description.
We are also incorporating
by reference all documents filed by the Registrant pursuant to Sections 13(a), 13(c), 14 and 15(d) of the Securities Exchange
Act of 1934, as amended, after the date of this Registration Statement and prior to the filing of a post-effective amendment to
this Registration Statement which indicates that all securities offered have been sold or which deregisters all securities then
remaining unsold, other than any portion of the respective filings furnished, rather than filed, under the applicable SEC rules.
The additional information incorporated by reference is a part of this Registration Statement from the date of filing of those
documents.
3
Any statement
contained in a document incorporated by, or deemed incorporated by reference herein, shall be deemed to be modified or
superseded for purposes of this Registration Statement to the extent that a statement contained herein or in any other
subsequently filed document which also is or is deemed to be incorporated by reference herein modifies or supersedes such
statement. Any statement so modified or superseded shall not be deemed, except as so modified or superseded, to constitute a
part of this Registration Statement.
The information relating
to us contained in this Registration Statement should be read together with the information in the documents incorporated by reference.
Item
4.           Description of Securities.
Not applicable.
Item
5.           Interests of Named Experts and Counsel.
Not applicable.
Item
6.           Indemnification of Directors and Officers.
The Colorado Business Corporation
Act allows a corporation to indemnify its directors, officers, employees, fiduciaries and agents against liability in certain situations.
Our Articles of Incorporation authorize us to indemnify our directors to the fullest extent permitted by Colorado law.
Under the Colorado Business
Corporation Act indemnification would be mandatory with respect to a director or officer who was wholly successful in defense of
an action, suit or proceeding. As permitted by the Colorado Business Corporation Act and our By-laws, we will indemnify directors
and officers, and may indemnify employees, fiduciaries and agents, against reasonably incurred expenses, judgments, penalties,
fines and amounts paid in settlement reasonably incurred by them in connection with an action, suit or proceeding if it is determined
that they conducted themselves in good faith and that they reasonably believed (i) in the case of conduct in their official capacity,
that their conduct was in the company's best interests, or (ii) in all other cases (except criminal cases), that their conduct
was at least not opposed to the company's best interests, or (iii) in the case of a criminal proceeding, that they had no
reasonable cause to believe their conduct was unlawful. In proceedings brought by or in the right of the Company, indemnification
will be limited to reasonable expenses incurred in connection with the proceeding. No indemnification will be provided with respect
to any claim, issue or matter in connection with a proceeding by or in the right of the Company in which the person was adjudged
to be liable to the Company on in any proceeding charging that the person derived an improper personal benefit, whether or not
involving action in an official capacity, in which they were adjudged to be liable to the Company on the basis that they derived
an improper personal benefit. Additional indemnification may be provided to officers, employees, fiduciaries or agents if they
are not also directors, so long as such additional indemnification is provided for by general or specific action by the board of
directors or stockholders or by contract and would not be inconsistent with public policy.
Section 7-109-108 of the
Colorado Business Corporation Act provides that a corporation shall have the power to purchase and maintain insurance on behalf
of its officers, directors, employees, fiduciaries and agents, against any liability asserted against and incurred by such persons
in any such capacity.
Section 7-108-403 of the
Colorado Business Corporation Act provides, among other things, that a director, who votes for or assents to an unlawful payment
of dividends or an unlawful stock purchase or redemption, may be held liable for such actions.
Section 7-108-402 of the
Colorado Business Corporation Act allows a Colorado corporation to eliminate or limit the personal liability of a director to the
corporation or to its shareholders for monetary damages for a breach of fiduciary duty as a director, except for liabilities arising
from any breach of the director's duty of loyalty to the corporation or its shareholders, from acts or omissions not in good
faith or which involve intentional misconduct or a knowing violation of law, from any transaction from which the director derived
an improper personal benefit, or from any other act, omission or transaction as to which the Colorado Business Corporation Act
prohibits the elimination or limitation of liability. Our Articles of Incorporation contain a provision limiting director liability
for monetary damages for his or her conduct as a director.
4
Our directors and officers
are covered by insurance policies maintained by us against specified liabilities for actions taken in their capacities as such,
including liabilities under the Securities Act of 1933.
Item
7.           Exemption from Registration Claimed.
Not applicable.
ITEM 8.  EXHIBITS.
The exhibits to this registration statement
are listed in the Exhibit Index that immediately precedes such exhibits and is incorporated herein by reference.
Item
9.           Undertakings.
A. The undersigned registrant hereby undertakes:
(1)
To file, during any period in which offers or sales are being made, a post-effective amendment
to this Registration Statement:
(i)
to include any prospectus required by Section 10(a)(3) of the Securities Act;
(ii)
to reflect in the prospectus any facts or events arising after the effective date of the Registration
Statement (or the most recent post-effective amendment thereof) which, individually or in the aggregate, represent a fundamental
change in the information set forth in the Registration Statement. Notwithstanding the foregoing, any increase or decrease in volume
of securities offered (if the total dollar value of securities offered would not exceed that which was registered) and any deviation
from the low or high end of the estimated maximum offering range may be reflected in the form of prospectus filed with the SEC
pursuant to Rule 424(b) if, in the aggregate, the changes in volume and price represent no more than 20% change in the maximum
aggregate offering price set forth in the "Calculation of Registration Fee" table in the effective registration statement;
and
(iii)
to include any material information with respect to the plan of distribution not previously disclosed
in the Registration Statement or any material change to such information in the Registration Statement;
provided, however
, that paragraphs (1)(i)
and (1)(ii) above do not apply if information required to be included in a post-effective amendment by those paragraphs is contained
in reports filed with or furnished to the SEC by the Registrant pursuant to Section 13 or Section 15(d) of the Exchange
Act that are incorporated by reference in the Registration Statement;
(2)
That, for the purpose of determining any liability under the Securities Act, each such post-effective
amendment shall be deemed to be a new Registration Statement relating to the securities offered therein, and the offering of such
securities at that time shall be deemed to be the initial bona fide offering thereof.
(3)
To remove from registration by means of a post-effective amendment any of the securities being
registered which remain unsold at the termination of the offering.
B. The undersigned Registrant hereby undertakes
that, for purposes of determining any liability under the Securities Act, each filing of the Registrant's annual report pursuant
to Section 13(a) or 15(d) of the Exchange Act, (and, where applicable, each filing of an employee benefit plan's annual
report pursuant to Section 15(d) of the Exchange Act) that is incorporated by reference in the Registration Statement shall
be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at
that time shall be deemed to be the initial bona fide offering thereof.
5
C. Insofar as indemnification for liabilities
arising under the Securities Act may be permitted to directors, officers and controlling persons of the registrant pursuant to
the foregoing provisions, or otherwise, the Registrant has been advised that in the opinion of the SEC such indemnification is
against public policy as expressed in the Securities Act and is, therefore, unenforceable. In the event that a claim for indemnification
against such liabilities (other than the payment by the Registrant of expenses incurred or paid by a director, officer or controlling
person of the Registrant in the successful defense of any action, suit or proceeding) is asserted by such director, officer or
controlling person in connection with the securities being registered, the Registrant will, unless in the opinion of its counsel
the matter has been settled by controlling precedent, submit to a court of appropriate jurisdiction the question whether such
indemnification by it is against public policy as expressed in the Securities Act and will be governed by the final adjudication
of such issue.
6
SIGNATURES
Pursuant to the requirements
of the Securities Act of 1933, Solitario Zinc Corp., certifies that it has reasonable grounds to believe that it meets all of the
requirements for filing on Form S-8 and has duly caused this Registration Statement to be signed on its behalf by the undersigned,
thereunto duly authorized, in Wheat Ridge, Colorado on April 10, 2018.
SOLITARIO ZINC
CORP.
By:
/s/ Christopher E. Herald
Name: Christopher E. Herald
Title: President and Chief Executive
Officer
Each of the undersigned
whose signature appears below hereby constitutes and appoints Christopher E. Herald or James R. Maronick and each of them acting
alone, his true and lawful attorneys-in-fact and agents, with full power of substitution and resubstitution, for him and in his
name, place and stead, in any and all capacities, to sign any and all amendments (including post-effective amendments) to this
Registration Statement, and any registration statement relating to the offering covered by this Registration Statement and filed
pursuant to Rule 462(b) under the Securities Act of 1933, and to file the same, with all exhibits thereto, and other documents
in connection therewith, with the Securities Exchange Commission, under the Securities Act of 1933, granting unto said attorneys-in-fact
and agents, and each of them, full power and authority to do and perform each and every act and thing requisite and necessary to
be done, as fully to all intents and purposes as he or she might or could do in person, hereby ratifying and confirming all that
each of said attorneys-in-fact and agents or their substitute or substitutes may lawfully do or cause to be done by virtue hereof.
Pursuant to the requirements of the Securities
Act of 1933, this Registration Statement has been signed by the following persons in the capacities and on the date indicated.
Signature
Title(s)
Date
/s/
Christopher E. Herald
Christopher E. Herald
President, Chief Executive Officer and Director
(Principal Executive Officer)
April 10, 2018
/s/
James R. Maronick
James R. Maronick
Chief Financial Officer
(Principal Financial Officer and Principal Accounting Officer)
April 10, 2018
/s/ John Labate
John Labate
Director
April 10, 2018
/s/ Brian Labadie
Brian Labadie
Director
April 10, 2018
/s/ James Hesketh
James Hesketh
Director
April 10, 2018
/s/ Gil Atzmon
Gil Atzmon
Director
April 10, 2018
/s/ Joshua D. Crumb
Joshua D. Crumb
Director
April 10, 2018
EXHIBIT INDEX
Exhibit No.
Exhibit Description
4.1
2013 Solitario Exploration & Royalty Corp.
        Omnibus Stock and Incentive Plan, incorporated by reference to Exhibit 99.1 to the Company's Form 8-K filed on June 20, 2013.
4.2
First Amendment to the 2013 Solitario Exploration & Royalty
        Corp. Omnibus Stock and Incentive Plan (incorporated by reference to Exhibit 10.1 to Solitario's Form 8-K filed on June 29,
        2017)
4.3
Form of Common Stock Certificate of Solitario Zinc Corp. (incorporated
        by reference to Exhibit 4.1 to Solitario's Form 10-Q filed on November 8, 2017)
5.1
Opinion of Polsinelli PC, filed herewith
23.1
Consent of EKSH LLLP, filed herewith
23.2
Consent of Polsinelli PC (included as part of Exhibit 5.1 of this Registration Statement)
24.1
Power of Attorney (included on signature page of this Registration
        Statement)