Each year basalt-topped Peridot Mesa, on the San Carlos Apache Reservation, is a major source for thousands of carats of gem-quality peridot in sizes suitable for use in modern jewelry. Marketed ...
Most Russian hydrothermal synthetic rubies and pink, orange, green, blue, and violet sapphires—colored by chromium and/or nickel—reveal diagnostic zigzag or mosaic-like growth structures associated ...
Amethyst may develop into the more common citrine and rarer green quartz naturally under certain geologic conditions. On the California-Nevada border, just north of Reno, amethyst, citrine, and green ...
GIA programs and courses are offered year-round on a rolling basis at GIA campuses around the globe. This enables students to jumpstart their gem and jewelry career studies at the soonest, most ...
Few people outside the gem industry realize the true nature of a gemstone’s journey from the mine to the counter of a store. Whether the gem is being offered to consumer’s at a traditional jewelry ...
在过去的 35 年里，人们见证了深圳从一个贫穷的渔村转变成为一个现代化的大都市。 如今，它是中国最重要的经济中心之一，也是中国宝石和珠宝行业的前沿。 照片版权属 Istockphoto 。 简介 在 ...
ルビー、サファイア、エメラルド、パライバ トルマリン、レッド スピネル、アレキサンドライトが、GIAカラー ストーン鑑別及び原産地レポートの対象となります。しかしながら、これはGIA ...
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