Color stability experiments show that the color of Queen conch shell and pearls may shift in hue and/or saturation under X-ray radiation or short-wave UV radiation.

冠状病毒对中国大陆及香港的经济影响。以及钻石市场和黄金首饰的最新资讯。

近日，GIA 科学家展示了他们在钻石标记以及钻石灰-蓝-紫颜色成因方面的最新研究成果。

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.

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

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 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.

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.

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.

James Shigley（詹姆斯·希格利）博士分享了 GIA 确定宝石原产地的方法以及钻石原产地的奥秘。

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。

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。

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。