New York is one of the world’s media, financial, entertainment, and fashion capitals. It’s home to the iconic landmarks like Wall Street and the Statue of Liberty, and to edgy artist enclaves like the ...

Diamond is available in a range of sizes and qualities to fit every consumer's tastes. One of the first things most people learn about diamonds is that not all diamonds are created equal. In fact, ...

An aquamarine crystal in its natural state shows why these specimens are prized for their beauty. - Courtesy Daniel Trinchillo, Fine Minerals International Aquamarine is the green-blue to blue variety ...

This 5.30-carat emerald from Brazil has a slightly bluish green color. Courtesy John Parrish, courtesy African, Brazilian, Colombian Gems Incorporated. Emerald has many special qualities, but colored ...

George Frederick Kunz（ジョージ·フレデリック·クンツ） クンツァイトは、カラーストーンの中では比較的新しい宝石でです。 伝えられているところによれば、まだ 正体不明のピンクの水晶の標本は、カリフォルニア州のサンディエゴ郡で発見され ...

As a consumer, you will regularly encounter in the marketplace gems that have been treated to change their appearance. A topic that often comes up is whether a particular gemstone is or isn’t treated.

这颗 122.70 克拉的丹泉石收藏在史密森尼国家自然历史博物馆。- Chip Clark（奇普·克拉克），由史密森学会友情提供 丹泉石是有色宝石系相对较新的成员。随着最常见的丹泉石采矿热潮的发展，1967 年马赛部落成员在坦桑尼亚北部地区的 Merelani 偶然发现了一簇因 ...

However gem quality diamonds are fashioned from the original crystal shape they possess a combination of brightness, sparkle, fire, and sense of purity not matched by other gems. - Jeff Scovil, ...

Cultured pearls come in different sizes, shapes, and colors. Perhaps the best-loved gems of all time, pearls—both natural and modern cultured pearls—occur in a wide variety of colors. The most ...

GIA’s diverse course offerings will help prepare you with the knowledge and skills needed by industry employers today.

Reviews the advancements and major trends in laboratory-grown diamonds observed by GIA since 2007. Gemological and Trace Element Characteristics of Cassiterite from Yunling, China Examines gem-quality ...

The green turquoise cabochon, from an American mine, might become part of a designer’s unique jewelry piece. The even blue color of the cabochon on the right would be called “Persian blue” in the ...