Anyone bought Zultanite while in Türkiye

I like to purchase jewelry in my travels. Especially pieces that are unique to the area or have a connection to the place I visited. For example, a porcelain ring from Budapest and a Claddagh ring from Galway.

Anyway, looks like Zultanite is something special to Türkiye. But know nothing about those. Anyone familiar that could offer information about what to look for and what to watch out for?