

CVD实验室培育钻石大小刷新世界纪录

New CVD Material Submitted for Analysis (英语)
A group of large, high-quality CVD material demonstrates the continued challenge of identifying laboratory-grown gems.

Largest CVD Laboratory-Grown Diamond Submitted to GIA (英语)
Progress in creating laboratory-grown CVD diamonds allows for larger sizes, including the largest yet seen at the Carlsbad lab.







GIA 图书馆十佳数字化文献








Geographic Origin Determination of Blue Sapphire (英语)
In some cases, the value of a sapphire depends strongly on its geographic origin. This article details the origin data GIA has collected for blue sapphire and describes its methodology for using the data in geographic origin determination.

野外宝石学:建立研究收藏并了解宝石矿床的形成
自2008年以来,GIA已在六大洲开展了90多次实地考察,积累了超过22,000件彩色宝石参考样品。这些来源明确的彩色宝石藏品为GIA的地理产地鉴定研究提供了有力支持。

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