Although lost for literally hundreds of years after the Spanish conquest of the Aztecs, many deposits of jadeite have been found in Guatemala during the last two decades. Following the discovery of ...

Jewelry-quality synthetic malachite is now being manufactured in the USSR. The texture, structure, and physical and physico-chemical properties of this synthetic malachite are reported. Three textural ...

Twenty-six peridot samples from the Esquel pallasite meteorite and 27 samples from 10 terrestrial sources were studied by laser ablation–inductively coupled plasma–mass spectrometry (LAICP- MS). Among ...

Blue sapphires are currently being mined on an exploratory basis from alluvial deposits at the Lindi mine, near the town of Mingxi in Fujian Province. The geology and occurrence of the sapphires ...

Figure 1. The largest known natural moissanite crystal, found along the Kishon River in northeastern Israel, measures 4.1 mm in its longest dimension. Photo by Vered Toledo. Synthetic silicon carbide ...

这颗大型澳大利亚淡色凸圆面蛋白石，重达 117.85 克拉。蛋白石上面布满了橙色和绿色的星火图案小型游彩闪光，灰色的体色缀以柔和的蓝色斑点。 每一颗蛋白石的外观和质量都大有不同。

GIA 的每门课程都是独一无二的，开始时间和课程长度、实习课所花时间、学费和其他费用都不相同。 研究宝石学家 (Graduate Gemologist ®) 取得业界最负盛名的专业证书，向全世界展示您的宝石和 ...

最优质的紫黄晶呈现出橙黄和紫色两个对比鲜明的区域。 这种优雅的切工设计恰好烘托了紫黄晶别具一格的颜色。 摄影：Lydia Dyer，© John Dyer & Co.，宝石由 John Dyer & Co. 友情提供 当玻利维亚紫 ...

Jadeite comes in a wide range of colors. The most valuable is an intense green called Imperial. - Courtesy Mason-Kay Fine Jade Jewelry To understand the value of jade, you have to look beyond its ...

钻石有着悠久的历史，是人们梦寐以求的珍品。 公元一世纪，古罗马博物学家普林尼（Pliny）说：“钻石不仅是宝石中最有价值的，而且是这个世界所有事物中最有价值的。“ 一颗钻石在最终 ...

With 65,000 volumes, 230,000 images, 2200 videos, and 1200 periodicals, the Richard T. Liddicoat Gemological Library & Information Center and Cartier Rare Book Repository & Archive is the largest, ...

A synthetic gem material is one that is made in a laboratory, but which shares virtually all chemical, optical, and physical characteristics of its natural mineral counterpart, though in some cases, ...