Based on this discussion, I've changed the tagging to shop=new_age, as I agree that this supports more consistent tagging for this type of shop. The point about how crystals could be  jewelry or raw materials is a good one. Changeset here: https://www.openstreetmap.org/changeset/141737824

I think shop=gift would be a downgrade on specificity, both people interested and not interested in the products sold here would want to know that this shop is not the same as one that sells t-shirts to tourists. And IMO my or any other mappers' views on the usefulness of the products here is not particularly relevant to the tagging question.

I don't always have the time to follow up the POIs I add with in-depth research about them, but since I already googled it to find the instagram page, I've added it as well.

Best,
Will