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.

GIA AGS Ideal^® 鉴定报告

丹泉石是蓝色至紫罗兰色至紫色的矿物黝帘石类别。世界上只有一个地区以商业规模开采丹泉石：坦桑尼亚（英文为 Tanzania）的 Merelani（梅勒拉尼）山，该宝石也因此而得名。

菊石：时尚的化石

Mr. Naseri grew up in the lapis trade, working in his father’s business as a young boy. Born in Afghanistan, he rightfully claims a deep knowledge of this gem of his native land.

Mr. Reif came to the Tucson Gem Show to promote his mine’s product: demantoid garnet, “one of the rarest stones alive.”

退伍军人法案适用于非大学学位（NCD）机构的培训，包括GIA美国宝石研究院。退伍军人事务部将独立评估每家学校的课程。

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

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.

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.

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