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.

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

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

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

以下为 GIA 根据规定节假日安排的课程表，部分上课日将延长至下午 4 点，以便学生假日休息。

精美的玛瑙切片均切割自同一个晶洞，该晶洞是 2014 年巴西南里奥格兰德州的豆农在耕地时发现的

这件绝美的博物馆标本名为“亚特兰蒂斯”，钟乳石尖部由绿色孔雀石打造，外面包裹着蓝色的硅孔雀石髓，如梦如幻。

Bahia（巴伊亚）

GIA 加入联合国全球契约

GIA’s Participation in the UN Global Compact

GIA 2013 年珠宝招聘会上的嘉宾分享了在宝石和珠宝行业取得成功的最佳建议。