
对比 D 到 Z 钻石鉴定证书

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为何委托 GIA 进行宝石分级和分析?

“充满奇迹”的生活:宝石学家对 30 年哥伦比亚祖母绿贸易的深思
GIA Diamond Focus® Report(钻石精要证书)提交指南
GIA Diamond Focus® Report(钻石精要证书)是高性价比的分级证书,以数字化格式提供特定天然钻石(未处理、颜色为 D 到 Z 、重量为 0.15 至 0.39 克拉)的关键分级信息。
Winter 2017 G&G Publication Information
This document provides the publication information for Gems & Gemology

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73rd Bangkok Gems & Jewelry Fair Trade Show
Join us at the Bangkok Gems & Jewelry Fair to explore a diverse range of gemstones, jewelry and industry solutions from leading Thai and international suppliers. Discover tools, components, and machinery for the trade, and attend GIA seminars on pearls and colored stone origin determination.

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