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　0.96ct【250818-2889】

This is a 0.96ct bi-color tourmaline with a gradient from clear blue to dark gray, cut in emerald style, from Afghanistan, graded AAA.

• 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.