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The GIA laboratory in Ramat Gan, Israel, will end operations by the end of 2024 due to changes in the global diamond industry that resulted in significant declines in submissions from local clients over the last several years.

介绍了对产自美国、墨西哥和中国的淡黄色长石进行的热处理和铜漫射试验结果。

GIA 第一位女性宝石学家及行业先锋。

除非另有说明，所有课程均以英语授课。 GIA 不将英语作为第二语言 (ESL) 来授课。

Learn about jade's durability and how to care for your jade jewelry.

Edward Gübelin（爱德华·古柏林）博士收集的藏品中，有许多来自世界各地的罕见宝石。

了解人们如此热衷彩钻的原因。