Emerald is the green to greenish blue variety of beryl, a mineral species that also includes aquamarine as well as beryls in other colors.

了解彩钻的坚固性，以及如何保养你的彩色钻石首饰。

尽管彩钻传统上只占钻石业务的一小部分，但过去几十年以来，知名度和供货能力都有所增长。

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。

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

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.”

List of books pertaining to the Tablet to Tablet exhibit presented by theThe Richard T. Liddicoat Gemological Library and Information Center, November 2011-August 2012, GIA, Carlsbad, California

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

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.

Dudley Blauwet, a colored gemstone dealer from Colorado, has been traveling throughout Asia and parts of Africa for three decades, hunting down good, saleable gem material.

In an exclusive interview with Edward Boehm at the 2013 Tucson Gem Show, GIA uncovers a rich vein of current information on supply and demand in the rare and high-end gem market.

It’s an emotional roller coaster following veteran gem dealer Evan Caplan in this exclusive GIA interview conducted at the 2013 Tucson Gem Show.