A transparent supply chain and the education of artisanal miners were two of the many topics discussed at Tucson’s first Ethical Gem Fair.

The Hong Kong laboratory recently examined a Burmese star ruby incorporating a significant amount of bismuth glass.

Presents a quantitative means of determining the causes of color in a gem material, using corundum’s six major chromophores as an illustration.

GIA 毕业生打造纪念别针，以表彰正在抗击新冠病毒的医护人员。

在钻石贸易中，“光效应”一词广为使用，但实际观察钻石时，“光效应”到底指的是什么？

在钻石贸易中，“光效应”一词广为使用，但实际观察钻石时，“光效应”到底指的是什么？

Russell Shor（罗素·肖尔）对多年来他所报道的行业新闻中遇到的人、见到的宝石和听到的故事的思考。

了解莫桑比克红宝石的开采历史、特征和市场需求等信息。

不要单凭颜色来判断黄色宝石。从钻石、黄水晶再到柘榴石，很多宝石也呈现黄色色彩。

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.

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。

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。

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。

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.

A look ahead to the future of geographic origin determination.

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.

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