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Turquiose
Article
Turquoise Description

Turquoise might lack the sparkle and clarity of transparent coloured gemstones like ruby, emerald and sapphire, but its multi-layered history and soul-satisfying colour make it a desirable gem. Its colour can range from dull greens to grass greens to a bright, medium-toned, sky blue

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Turquoise
Article
Turquoise Quality Factors

Typically, turquoise is judged on three basic quality factors: colour, texture and the presence or absence of matrix. Learn more about turquoise and what makes this gem so sought after!

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Turquoise
Article
Turquoise History and Lore

Turquoise is one of the world’s most ancient gems. Archaeological excavations revealed that the rulers of ancient Egypt adorned themselves with turquoise jewellery, and Chinese artisans were carving it more than 3,000 years ago.

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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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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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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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1.79 ct Diamond in DiamondView
Summer 2009 G&G Lab Notes

This section, from the Summer 2009 issue of Gems & Gemmology, 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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