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A large red-orange crystal of wulfenite is nestled in the arms of matrix.
Article
Arizona Road Trips: Wild West Gem and Mineral Localities

Arizona’s scenic desert and mountain landscape is the perfect backdrop for a modern Wild West road trip in search of gem and mineral treasures.

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The gems spell out “The 2000th Gem Stone Design.”
Article
Gemstone ‘Paintings’ Tell Story of a Master Craftsman, Gem and Jewellery Mentor

A jeweller who quietly built up a circle of inspiration and influence lives on in generations of GIA-educated jewellers and gemmologists.

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Starlet in sunglasses above title “Hooray for Hollywood
Article
M.D. Hohenstine’s Gem Displays: The Process of Creating Popular Window Art with Loose Gemstones

Jeweler M.D. Hohenstine’s spectacular window displays were a beloved tradition in downtown Columbus, Ohio, for more than 50 years.

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Dyed and impregnated turquoise.
Impregnated and Dyed Turquoise

Natural turquoise has been subjected to dyeing and three types of impregnation.

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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.

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Turquoise with Fingerprint Pattern

A fingerprint pattern, possibly left by human skin oils during the assembly process, is observed in natural turquoise beads.

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Turquoise-Rock Crystal Composite

Examination of a faceted rock crystal backed by a slice of turquoise: an obvious but unusual combination of gem materials.

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Summer 1994 G&G Lab Notes

This section, from the Summer 1994 issue of Gems & Gemmology, is a compilation of interesting finds from GIA’s laboratories.

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Spring 2010 G&G lab notes

This section, from the Spring 2010 issue of Gems & Gemology, is a compilation of interesting finds from GIA's laboratories.

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Two Strands of Treated Chalcedony
Winter 2009 G&G Lab Notes

This section, from the Winter 2009 issue of Gems & Gemmology, is a compilation of interesting finds from GIA’s laboratories.

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