了解 GIA 用于确保最精确、最科学的钻石分级结果的分级流程。

GIA 是世界上公认的最具权威的钻石鉴定机构，并且在天然和养殖珍珠鉴定和分类领域,自 1949 年以来就一直处于领先水平。

无论在什么地方，只要能通过互联网登入“我的鉴定所”，您就可以即时查看和管理您的宝石工作状态。这个全天候安全门户网站提供有关您物品的最新信息以及其他宝贵资源。

了解一种可以更简单快捷地验证多个证书并访问多个 PDF 证书文件的方法。

For more than two decades, former plumber, welder and jewelry store-owner Dyber has been dazzling the world with his brilliant stone carvings ranging from sizes that fit in the palm of the hand to 12-lb quartz behemoths that can dominate a room.

A native of Kenya, Susie Kennedy teamed up with her husband in the 1990s to establish their place in the gem industry.

GIA^® Laboratory FZCO is located in the important global diamond center of Dubai and will provide diamond services with limited capacity.

Library Services

Staff Picks

The first woman on the executive team and head of GIA’s innovative marketing and public relations efforts for nearly 30 years.

Brendan Hoare specializes in mantle geochronology and geochemistry.

Evan M. Smith specializes in diamond geology.

Rachelle Turnier specializes in colored gemstone geochemistry

Bassoo specializes in Understanding the spatial distribution and geological causes of defects in green diamonds

Sona Tajiryan specializes in Early Modern History of Global Gem Trade.

Yang Mo specializes in Mathematics.

Cookie Notice

Digital Materials at the GIA Library

向 GIA 提交物品进行分析和分级时，您须对经过处理的或实验室制造的宝石材料进行披露。

GIA 是世界上最值得信赖的钻石分级和宝石鉴定机构，GIA 展会服务鉴定所为行业活动提供直接的鉴定服务。