An overview of the geographic origin complexities facing the gem and jewelry industry today.

The world ruby market has undergone dramatic change in recent years, especially with the development of ruby mining in Mozambique. This contribution outlines GIA’s methods and criteria for establishing the geographic origin of ruby.

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.

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.

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.

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。

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。

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。

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。

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。

Resin materials marketed as imitation ivory were recently acquired by a GIA gemologist.

The Hong Kong laboratory recently examined a 14.36 ct pink-orange cushion mixed-cut specimen.

Artificial glass, a low-cost material, is capable of simulating any gemstone owing to its range of appearances (bodycolor, transparency, and phenomena).