Fraudulently Inscribed Synthetic Moissanite

The Mumbai laboratory finds a fraudulent GIA inscription on synthetic moissanite.

阅读更多

Cat’s-Eye Paraíba Tourmaline with Copper Inclusions

The Tokyo laboratory examines a Paraíba tourmaline with chatoyancy caused by copper inclusions.

阅读更多

您或许还会喜欢

YMAL GIA Ed
了解校园课程和在线教育
Learn About NextGem
GIA NextGem™ 钻石零售 培训
Explore GIA Laboratory Promotional Offers
探索 GIA 鉴定所的促销优惠
Shop the GIA Store
访问 GIA 商店