A compilation of gem news from around the world, covering topics such as localities, unusual gem materials, market news, new products, discoveries, jewelry manufacturing techniques, and industry trends.

This section, from the Winter 1995 issue of Gems & Gemology, is a compilation of interesting finds from GIA’s laboratories.

“Gemstones of Afghanistan”; “The Volcanic Earth”

This section, from the Winter 1996 issue of Gems & Gemology, is a compilation of interesting finds from GIA’s laboratories.

Since at least 1995, various materials have been manufactured to imitate tanzanite in the gem trade.

The fact that significant amounts of sapphire have been found in situ at Changle makes it unique among sapphire deposits in basaltic terrains around the world.

A compilation of gem news from around the world, covering topics such as localities, unusual gem materials, market news, new products, discoveries, jewelry manufacturing techniques, and industry trends.

This section, from the Winter 2006 issue of Gems & Gemology, is a compilation of interesting finds from GIA’s laboratories.

“Leopard opal” consists of vesicular basalt impregnated with play-of-color opal, and is known only from Zimapán, Hidalgo State, Mexico.

Bicolored (aquamarine-morganite) beryl from a 1986 discovery at the Bananal mine is described.

This study presents a model for the origin of the Eskisehir, Turkey, sepiolite deposits.

This paper describes the discovery of a new defect center in natural and synthetic type Ib diamonds, named the Y center.

This short article discusses several important aspects of crack-filling in colored stones and diamonds.

Three-phase inclusions in untreated natural colorless, yellow, and blue sapphires from Sri Lanka were found to consist of liquid and gaseous carbon dioxide as well as needle-like to tabular crystals of diaspore.

Green grossular garnet crystals of fine form and clarity have been found recently in Tanzania.