
Amethyst Description
Amethyst is the purple variety of the quartz mineral species and the gem most commonly associated with the color purple.




夏季时尚理念:彩色俏皮珠宝
镶工提示 #3:探索 CAD CAM 的益处


“平片到平片”展览概要
RICHARD T. LIDDICOAT (理查德·特·利德寇特) 宝石学图书馆和信息中心于 2011 年 11 月至 2012 年 8 月在加利福尼亚州卡尔斯巴德举办的展览。


钻石描述
钻石是唯一一种由单一元素(碳)构成的宝石:其中的碳含量高达 99.95%。 另外 0.05% 可能是一种或一种以上的微量元素,这些原子不属于钻石的基本化学结构。 一些微量元素可以影响它的颜色或晶体形状。
New Treatments and Imitation Gems
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.
Dealing in Lapis Lazuli from Afghanistan
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.
Demantiod from the Green Dragon Mine
Mr. Reif came to the Tucson Gem Show to promote his mine’s product: demantoid garnet, “one of the rarest stones alive.”

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