Related Articles
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.

Axinite Value, Price, and Jewelry Information

Information on Axinite Gemstones. These gems are an extremely rare cut gem and could be on the most magnificent because of its rich colors and brilliance.