Related Articles
3.60 cts axinite, oval cut - Pakistan
Axinite Value, Price, and Jewelry Information

Everything you ever wanted to know about axinite. Find value guidelines, scientific data, expert comments, and more in our Gemstone Listings.

How Can A Gemstone’s Optic Sign Change?

A gemstone's optic sign may be listed as either + or -. Learn whether impurities in a specific stone or the choice of axes to measure RI cause the change.