A researcher, author, and instructor regarded as a

For more than 30 years, the beauty of science has found expression in every issue of Gems & Gemology, thanks in large part to one influential editor and innovator, Alice Keller.

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

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

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.

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

Jeff Mason provides us with a fascinating look into a sometimes-misunderstood gem and its often-unpredictable market.

Jeff Mason provides us with a fascinating look into a sometimes-misunderstood gem and its often-unpredictable market.

Nomad’s specializes in a wide range of high-end colored stones such as spinel, tourmaline, peridot, garnet, and corundum, all untreated. Saltzman finds that trade shows are excellent places for educating consumers about the differences between treated and untreated stones.

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.