Copper-bearing tourmaline from Mozambique was first recovered in 2001, but its Cu content was not recognized until 2003, and it was not widely sold with its Mozambique origin disclosed until 2005. It ...

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 ...

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 ...

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 ...

Attain your dreams of a GIA education with scholarships. We encourage on-campus students to apply for assistance and we are happy to help you coordinate your efforts. GIA-administered scholarships are ...

This jadeite "Peiyao" (Chinese Fu dog) represent mythological creatures that guard and protect celestial palaces and entrances. - Gift of Sophie Leu Jade has been cherished for thousands of years.

This miner is handling a kunzite crystal at the Oceanview Mine in Pala, California, for the very first time since its formation. - Brendan Laurs Few people outside the gem industry realize the true ...

Established in 1931, the Gemological Institute of America (GIA) is the world’s foremost authority on diamonds, colored stones, and pearls. A public benefit, nonprofit institute, GIA is the leading ...

Several varieties of aventurescent feldspar are well known in the gem trade. Of these, one of the most remarkable is orthoclase from the Hart’s Range area in Australia. This unique material showcases ...

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, ...

红宝石是刚玉矿物种别（其中还包括蓝宝石）中的一个类别。 红宝石备受珍视，每克拉单价很高。可以说，红宝石是有色宝石市场中最重要的宝石之一。 最纯的刚玉矿物是无色的。微量元素 ...