Explore GIA’s collection of free, rare digital books and manuscripts that document the history of gems and jewellery.
Read MoreTurquoise 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
Read MoreTypically, 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!
Read MoreTurquoise 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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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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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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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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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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Natural turquoise has been subjected to dyeing and three types of impregnation.
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This section, from the Summer 2009 issue of Gems & Gemmology, is a compilation of interesting finds from GIA’s laboratories.
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