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Amethyst Mining in Brazil
Titanium-Coated Tanzanite
马达加斯加 Didy 地区出现大量红宝石和蓝宝石(2012 年 4-6 月)
斯里兰卡卡达拉加玛附近的蓝宝石热潮(2012 年 2 月 - 3 月)
Satellite
This article provides identification criteria to distinguish between modern and fossil (mammoth) elephant ivory.
Ametrine with Layers of Smoky Quartz
Helvine Inclusions in Morganite
Heliodor and Aquamarine with Surface Etching
Hexagonal etch features are observed on the prismatic faces of heliodor and aquamarine crystals.
