
Trapiche Emerald from Colombia
The examination of a nearly complete trapiche emerald crystal–which are difficult to obtain–is consistent with the findings of previous studies.


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

Conversation with Color Source Gems
Moshe and Rachel Chalchinsky of Color Source Gems talk about current trends in the gem and jewelry trade.

Spring 2019 G&G: Tourmaline Classification, Provenance of Freshwater Pearls, and the Annual Tucson Report
An overview of the Spring 2019 Gems & Gemology content.


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。

St. Jude Kids Tour Inside Gems’ Magical World
Young patients at St. Jude Children’s Research Hospital recently explored the inner world of gems and minerals with a visiting team from GIA.

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。




Laboratory-Grown Diamonds: Demand Rises, Prices Fall
The proliferation of laboratory-grown diamonds into the market continues to dominate industry news. Plus: Natural Diamonds, Kimberley Process


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