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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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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.

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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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Rough sapphires from Chila, Ethiopia.
Sapphires from Northern Ethiopia

A new source of sapphires is found in the Tigray region of Ethiopia.

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“Queen Thai” bracelet with fire opals.
New Designs from Paula Crevoshay

World-renowned jewellery artist Paula Crevoshay displays some of her newest pieces at the Tucson gem shows.

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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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Rubellite rough.
Tourmaline and Sapphire from Nigeria

An update on Nigerian coloured stone production is obtained at the Tucson gem shows.

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Natural-color yellow sapphires with FTIR features of Punsiri-treated sapphire
“Punsiri”-type FTIR Spectral Features in Natural Yellow Sapphires

Testing of natural-colour yellow sapphires from Australia and Thailand with the FTIR features of “Punsiri” heat-treated material.

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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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JTV broadcasts from Tucson
Jewelry Television in Tucson

A look at JTV’s history, current activities and impact on the industry.

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