The range of Tanzanian gems’ lovely colors — both natural and slightly treated — is Mr. Sevdermish’s particular passion.

For some time, Brazil was considered the sole legitimate source of the electric-blue tourmaline known as Paraíba. As a result, Mr. Konate and his company met considerable resistance when they first started mining similar material in Mozambique.

Paula Crevoshay’s one-woman exhibit of her jewelry designs at the Carnegie Museum in Pittsburgh speaks for her esteemed status in the jewelry world. In this GIA exclusive interview recorded at the 2013 Tucson Gem Show, she speaks for herself and her art in eloquent and compelling detail.

In an exclusive interview with GIA conducted at the 2013 Gem Show in Tucson, Rajneesh Bhandari pulls back the curtain on the too-often secretive world of gemstone treatments.

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。

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.

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.

At age 79, Bob Halem loves reminiscing about the serendipity that brought him into the world of colored stones.

An exploration of the distinction between jadeite and omphacite, plus GIA's current policy concerning the definition of these stones.

卡尔斯巴德校区的在校就读申请

纽约校区在校申请

James Sowerby（詹姆斯·索尔比）的《英国矿物学》(British Mineralogy) 及其对 Martha Proby（玛莎·普洛比）和 19 世纪科学界的影响。

Renowned teacher, master of gem identification, and developer of gemological techniques and instruments.

Bridges reflects on his father’s life and work, which led him from his native Scotland to Africa, where he made his mark in the gem world with the discovery of tsavorite. For all the fame the discovery brought him, it seemed cursed from the start.

Mr. Pavlik started out buying and selling cut gems, then added gem cutting to his skill set with a stint in the famed cutting center of Idar-Oberstein. Eventually, he turned to liquidation of others’ excess and unused gem materials. Now, he travels the world to seek gems that, for one reason or another, haven’t sold, and matches those “unwanted” products with the right buyer.