GIA 钻石原产地鉴定服务参与者
GIA 钻石原产地鉴定服务依靠参与的矿业公司、制造商、批发商和零售商,确保向最终消费者提供已确认原产国且已经过专业分级的天然钻石。通过提供以下列表,我们鼓励整个供应链中的公司在为客户采购获得 GIA 钻石原产地鉴定证书的钻石时,彼此多多交流。




Summer 2025 G&G Publication Information
This document provides the publication information for Gems & Gemology


GIA Diamond Origin Report Submission Guidelines
Student Housing London

GIA Gübelin(古柏林)宝石项目:各种宝石(磷锂铝石 — 斧石)
Among the collection assembled by Dr. Edward Gübelin are a number of uncommon gemstones from many worldwide localities.




Reserve Your GIA Museum Tour Experience
Reserve your guided museum tour today at GIA and enjoy a unique immersive experience!
Winter 2025 G&G Publication Information
This document provides the publication information for Gems & Gemology

Finds from the Secondary Market
Dave Bindra shows some noteworthy pieces he obtained on the secondary market and shares his thoughts on the state of the colored stones market.
The Cause of Iridescence in Rainbow Andradite from Nara, Japan
“Rainbow” andradite from Nara, Japan, occurs as relatively small orangy brown crystals that show attractive iridescence in almost the entire range of the spectrum.


.jpg)


