
Boulder Opal Mining with Rod Griffin (英语)
At the AGTA show, Rod Griffin (Rod Griffin Boulder Opals, Silverado, California, and Queensland, Australia) told us that the world market for all types of opals continues to be strong, but Australia’s opal industry is shrinking due to the costs, challenges, and changing regulations of mining.

Thoughts on the Chinese and Japanese Gem Markets
Shahin Aboosalih of SR Trading shares his insights on the gem and jewelry industry.

Sourcing Stones with Columbia Gem House
Thoughts from a longtime Tucson exhibitor on responsible practices and the changing market trends.

The Rock Hound: Muzo Emeralds and Ethical Practices
Susi Smither discusses her sustainable, responsible, and ethically based business practices.


CVD Layer Grown on Natural Diamond
A composite of synthetically grown and natural diamond was recently identified by the Carlsbad laboratory.


Observations on the Heat Treatment of Basalt-Related Blue Sapphires
Researchers from GIA’s Bangkok laboratory seek to identify low-temperature heat treatment in basalt-related blue sapphires.
GIA 通过改进的“了解客户”计划来推广最佳实践
加利福尼亚州卡尔斯巴德 — 2019 年 4 月 29 日 – 为了遵守适用的法律、法规和最佳实践,GIA 正在改进其“了解客户”(KYC) 计划。


戴比尔斯供应增加,FTC 对“环保”声明发出警告
戴比尔斯积极应对波动,FTC 发出有关实验室制造钻石的警告。另附:揭开 302.37 克拉 Graff Lesedi La Rona(我们的光)的神秘面纱。

通过 GIA 的零售商支持计划推广有色宝石
加利福尼亚州卡尔斯巴德 – 2019 年 4 月 8 日 – 参加 GIA 零售商支持计划的零售商现在可以使用进一步增加的有色宝石推广材料向客户讲述这些美丽宝石的故事。





图森之行激起地质教授和出版商的返校热情
身为地质学家和出版商的他取得了研究宝石学家 (GG) 文凭,因此可以和访问他所运营的地球科学网站——Geology.com 的访客分享更多有关宝石材料的信息。

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