

Revealing “The Angel in the Stone”: The Largest Known Square Cushion-Cut Tsavorite

Book Review: The Secret Teachings of Gemcutting: 50 Classic Gemstone Designs
红外显微镜的应用
马达加斯加 Didy 地区附近出现了大量的红宝石和蓝宝石






彩钻描述

钻石的历史与知识
来自《宝石与宝石学》(Gems & Gemology) 的合成钻石文章
在通用电气于 1971 年制成第一颗宝石级合成钻石时,公司首先将它们送到了 GIA 进行检验和研究。 44 年后的今天,GIA 研究人员密切跟踪了这些实验室培养的钻石的发展 - 从早期实验到市场的商业量化生产。
Emerald Dealer Shares Risks and Rewards
In this exclusive interview with GIA conducted at the 2013 Tucson Gem Show, Groom delivers a highly instructive tutorial on the critical nexus between gemology and business.
Market Insight From a Colored Gem Dealer
Bill Vance, a colored gemstone dealer from Delaware, sounds the twin notes of apprehension at the increasing worldwide scarcity of high-quality colored-stone rough, and excitement at the investment opportunity this presents for the middle-range buyer.
Inside the Geode Business
At age 79, Bob Halem loves reminiscing about the serendipity that brought him into the world of colored stones.

John Koivula
A pioneer in the field of photomicrography and the study of inclusions led to groundbreaking changes in the study of gems.

Lester Benson(莱斯特·本森)(1921 年-1961 年)
Renowned teacher, master of gem identification, and developer of gemological techniques and instruments.

.jpg)
