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Gemstones

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A black star sapphire with one set of golden rays and another set of silver rays.
Twelve-Rayed Star Sapphire from Thailand

A black star sapphire produced from eastern Thailand, showing both golden and silver rays, is studied at GIA’s Bangkok lab.

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The examined golden sheen sapphires.
Update on Trace-Element Chemical Characteristics of Golden Sheen Sapphire

An update the gemmological and chemical characteristics of golden sheen sapphires from Kenya.

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Spring 2000 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.

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Map of Russia.
Multiphase Fluid Inclusions in Blue Sapphires from the Ilmen Mountains, Southern Urals

Sapphires from Russia’s Ilmen State Reserve may provide an insight into gem-quality corundum from secondary placers.

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Sustainably mined yellow sapphire with a transparent chain of custody.
Ethical and Sustainable Vertical Integration in the Sapphire Market

The recession of 2008 transforms a gem business into a vertically integrated operation.

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Map showing Muling’s location
Ruby and Sapphire from Muling, China

An emerging corundum deposit in north-eastern China is discussed.

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Autumn 2005 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.

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Summer 2007 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.

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Miners Dig Pits in Montepuez
Summer 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.

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Winter 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.

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