バイカラートルマリン　エメラルドカット　アフガニスタン産　0.66ct【250818-2887】

This is a bi-color tourmaline with a gradient from clear blue to dark gray, cut in emerald style, weighing 0.66 carats, from Afghanistan.

• The description claims that tourmaline is a mineral with complex components and can be sorted into about 10 groups.
• The description claims that tourmaline has been found to have permanent electric poles at both ends.