Colombian Emerald Industry: Winds of Change
A firsthand look at Colombia’s emerald mines and the cutting and trading industry in Bogotá.
Book Review: Taffin: The Jewelry of James de Givenchy
Review of Taffin: The Jewelry of James de Givenchy, by James Taffin de Givenchy, Tobias Meyere, and Hamilton South.
A Review of HPHT Synthetic Diamonds Grown forJewelry Use
Get Your New GIA Alumni Association Logo and Support Materials
Alumni across the globe participate in chapter events and are out in full force to support the trade. There are a variety of ways you can join them.
Multi-Color-Zoned Quartz from Brazil
Yellow, Green, and Blue Sapphires Reportedly from Antang and Gombe, Nigeria
Nineteen sapphires of various colors, reportedly from sources in northern Nigeria, are studied in GIA’s Tokyo laboratory.
合成钻石的最新进展
James Shigley(詹姆斯·史格雷)博士是 GIA 的一位特聘研究员,也是钻石和钻石鉴定领域的重要专家之一。 在 2017 年拉斯维加斯 JCK 国际珠宝展演讲中,他分享了高温高压处理 (HPHT) 和化学蒸气沉淀法 (CVD) 合成钻石的最新进展

Visit Europe’s First Diamond Mine
Geology and Development of the Lomonosov Deposit, Northwestern Russia
Reviews diamond discoveries at the Lomonosov deposit, as well as the geology of the Arkhangelsk kimberlite province.

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