

Katzenbach Designs 在两年内荣获两项 AGTA 奖
Designer specializes in Maine tourmaline, precision faceting, fantasy-cut gemstones and custom-designed jewelry.



Get Your New GIA Alumni Association Logo and Support Materials
Alumni across the globe participate in chapter events and are out in full force to support the trade. There are a variety of ways you can join them.







合成钻石的最新进展
James Shigley(詹姆斯·史格雷)博士是 GIA 的一位特聘研究员,也是钻石和钻石鉴定领域的重要专家之一。 在 2017 年拉斯维加斯 JCK 国际珠宝展演讲中,他分享了高温高压处理 (HPHT) 和化学蒸气沉淀法 (CVD) 合成钻石的最新进展






春天的 2017年拍卖更新: 有史以来最昂贵的宝石和其他记录
The spring 2017 auction season saw two important price records fall and solid, if not rising, prices for top gems across the board.

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