The existence of a natural red andesine deposit in China/Tibet has been the subject of controversy since 2006.

Gem-quality brownish red zircon occurs in alluvium derived from Tertiary alkali basalt at Muling in the northeast Chinese province of Heilongjiang.

Red copper-containing plagioclase feldspar from Oregon has been available for over a century.

Natural-color saltwater cultured pearls from Pinctada margaritifera were studied by diffuse reflectance UV-Vis-NIR spectroscopy.

An important deposit of andradite, containing demantoid and topazolite varieties, has been mined near the village of Antetezambato in northern Madagascar since early 2009.

Pietersite has been described as a brecciated variety of tiger’s-eye.

一颗“美乐珠”仿品

An examination of synthetics in the marketplace over the first decade of the 2000s.

在 2010 年 10 月 22 日举办的 GIA 第 20 届年度珠宝招聘会 (Jewelry Career Fair) 上，宝石和珠宝行业的专家与求职者分享了一些建议。

根据微量元素的化学反应，尝试运用 LA-ICP-MS（激光剥蚀电感耦合等离子体质谱仪）技术区分天然和合成孔雀石。

关于某钻石桌面和亭部刻面之间呈现明显不同荧光行为（辐射的明显迹象）的报告。

The first decade of the 2000s continued the trend of using more powerful analytical instruments to solve gem identification problems.

A new opal deposit was discovered in 2008 near the village of Wegel Tena, in volcanic rocks of Ethiopia’s Wollo Province.

The past decade saw some impressive discoveries of diamonds and colored stones.

Advances in technology and increased demand for lower-priced gem materials contributed to the proliferation of new treatments throughout the first decade of the 2000s.

Two historic blue diamonds, the Hope and the Wittelsbach-Graff, appeared together for the first time at the Smithsonian Institution in 2010.

Several conspicuously colored specimens marketed as dyed and/or stabilized turquoise were recently examined.

关于使用“助熔剂部分愈合裂缝” (FAPFH) 和玻璃裂缝填充 (GFF) 技术对产自莫桑比克蒙特普埃兹地区的红宝石进行了高温加热处理的报告。