Article Search Results

Show Filters
Showing 38 results for "*"
A miner in northern Tanzania examines rhodolite.
Gemstone Guidebook Project

A project coordinated by GIA and the NGO Pact provides a valuable educational tool to women miners in Tanzania.

Read More

Five zircon samples studied for radioactive degradation of crystal structure.
Chemical Analysis of Zircon

Trace-element analysis is used to identify metamictisation, treatment and growth conditions of zircon.

Read More

The superior size and color of the 325.13 ct. tsavorite garnet from Merelani was discovered at the Tucson Gem & Mineral show in 2007. Courtesy of Michael Couch & Associates, West Des Moines, Iowa; photo by Robert Weldon © GIA
Article
The Glory of Green Gems

Green gemstones, which can uplift and heal our spirits, have been popular gem choices ever since we began to adorn ourselves with jewellery.

Read More

Short-wave UV exposure’s effect on zircon colour
Tenebrescent Zircon

Colour modification is observed in a reddish orange zircon at the Bangkok laboratory.

Read More

Combodia river mining
Article
Gem Mining in Cambodia

How to examine a sapphire crystal for cracks and inclusions.

Read More

Winter 2011 G&G Lab Notes

This section, from the Winter 2011 issue of Gems & Gemmology, is a compilation of interesting finds from GIA’s laboratories.

Read More

Autumn 2011 Gem News International

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

Read More

Scattered Metallic Black Inclusions
Spring 2010 Gem News International

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

Read More

Ametrine from Yuruty, Bolivia
Update on Ametrine from the Yuruty Mine, Bolivia

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

Read More

Cambodian Zircon Deposit
Summer 2009 Gem News International

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

Read More