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。

The geographic source of this rare color-change gem has a significant impact on value. Trace element chemistry profiles allow GIA to accurately determine origin for alexandrite from several countries.

Geographic origin determination relies on a combination of gemological observations and advanced analytical tools. This contribution reviews the analytical methods commonly used to establish origin.

Copper-bearing gem tourmaline, known as Paraíba tourmaline after the location of its original discovery, is prized for its vivid blue to green color. This article explains GIA’s use of quantitative chemical analyses to distinguish samples from Brazil, Nigeria, and Mozambique.

Over the last two decades, knowledge of the formation of gem deposits has improved significantly. This article reviews the state of our knowledge of the geology and genesis of gem corundum and emerald deposits.

The relative chemical diversity of emeralds from different deposits worldwide allows clear origin determination in most cases. This contribution explains the criteria used by GIA to make geographic origin conclusions for emeralds.

看看在亚当·桑德勒电影《未切割的切割》中扮演主要角色的粗糙蛋白石。蛋白石的真正宝石学和来源信息是什么？

近日，GIA 纽约研究人员有幸得以研究迄今发现的最独特有趣的一颗钻石晶体。

近日，GIA 纽约研究人员有幸得以研究迄今发现的最独特有趣的一颗钻石晶体。

美国假日销售额相比 2018 年呈现小幅增长。网上购物激增，零售客流量则放缓。

一段经历众多自我发现和兴趣探索的人生道路，最终道路交汇，通往珠宝设计师之路。

无论是“宝石私语者”还是数学家，宝石切磨师创造了惊人的珠宝艺术。

世界两大钻石生产商表示，钻石原石销售经过几个月的严重下滑后，目前市场开始企稳。

2019 年 GIA 鉴定所接收的最有趣独特的宝石。

关于斯里兰卡有色宝石的注释文献清单

世界两大钻石生产商表示，钻石原石销售经过几个月的严重下滑后，目前市场开始企稳。

世界两大钻石生产商表示，钻石原石销售经过几个月的严重下滑后，目前市场开始企稳。

在亚利桑那州壮丽的沙漠和高山风光下，来一场寻找宝石和矿物宝藏的现代狂野西部自驾游再适合不过了。

The New York lab recently identified a sapphire entirely covered with a cobalt coating to enhance its blue color.

An eye-visible cloud with a star-like pattern is highlighted by the cut of the Rare Sun diamond.