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Turquoise
Azure sky, robin’s egg blue: Vivid shades of turquoise define the color that’s named after this gem.
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Barite-Calcite Composite as Imitation “Wulanhua” Turquoise from Hubei Province, China
“Wulanhua” turquoise bracelet identified as composite material made of barite, calcite, and blue dye.
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Persian Turquoise: The Ancient Treasure of Neyshabur
Reports on the geology, background, and current state of mining and production at Iran’s largest turquoise mine.
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Unique Raindrop Pattern of Turquoise from Hubei, China
Presents spectroscopic and chemical analysis of a new variety of turquoise with a rare raindrop pattern with saturated colors.
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Article
Top 10 Digital Reads from the GIA Library
Explore GIA’s collection of free, rare digital books and manuscripts that document the history of gems and jewelry.
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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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Turquoise from Western Arkansas
A report on turquoise from the only known U.S. deposit outside of the Southwest.
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Article
Gemstone ‘Paintings’ Tell Story of a Master Craftsman, Gem and Jewelry Mentor
A jeweler who quietly built a circle of inspiration and influence lives on in generations of GIA-educated jewelers and gemologists.
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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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Golden Rutilated Quartz Artisanal Mining Community
Plans to develop a collective in a remote Brazilian rutilated quartz mining community are unveiled.
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“Boldly Go” with a Southwest-Inspired Starship Enterprise
An eye-catching replica from a cult TV favorite is found in Tucson.
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