Transparent crystal inclusions and gas bubbles are observed in a garnet-topped doublet.
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A unique doublet displaying a yellowish chatoyant sheen is examined by the Tokyo lab.
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Gem Testing lab in Jaipur, India recently examined a white-brown, translucent to opaque oval cabochon that turned out to be a composite featuring an unusual combination of gem materials.
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The gem and jewelry industry mourns the loss of one of its true leaders.
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This 9.12 gram amber composite featured a combination of natural and imitation amber, accompanied by natural and artificial insect inclusions.
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Examination of a faceted rock crystal backed by a slice of turquoise—an obvious but unusual combination of gem materials.
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This media-rich, interactive program makes it possible for GIA graduates to stay up to date with the latest gem and jewelry news and information.
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Vania Leles earned her GG from GIA in London in 2004 and promptly sent her curriculum vitae to Graff Diamonds on Bond Street for her dream job.
Read MoreAmmolite is a form of aragonite that is obtained from vivid iridescent fossilized ammonite shells mined in Alberta, Canada.
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This section, from the Spring 1991 issue of Gems & Gemology, is a compilation of interesting finds from GIA’s laboratories.
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