Fall 2017 - Volume 53, Issue 3
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Diamond ring with 100 melee side stones.
Screening of Mounted Melee Using the GIA iD100

GIA’s new screening device accurately identifies an HPHT-grown melee diamond.

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Flux-grown pink synthetic sapphire with unusual inclusions.
Flux-Grown Pink Synthetic Sapphire with Unusual Crystal Inclusions

Gemological testing and advanced analyses of a pink stone reveal unexpected results.

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Synthetic overgrowth on heated Burmese ruby.
Elements in Synthetic Overgrowth on Flux-Heated Ruby and Beryllium-Diffused Sapphire

Synthetic overgrowth caused by two different types of treatment are found on two samples in the Tokyo lab.

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Precious opals with unusual bodycolor.
Unusual Bodycolors of Precious Opal

Two stones with unusual bodycolor are identified as precious opal.

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Front and back views of brown dyed precious opal.
Ethiopian Precious Opal with a Dyed Brown Bodycolor

An opal from Ethiopia with a natural-looking bodycolor is found to be dyed.

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Natural freshwater pearl with form of a fish.
Natural Freshwater “Fish” Pearl

A uniquely shaped freshwater pearl is examined in the New York lab.

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Synthetic diamond with fake GIA inscription.
Synthetic Diamond Fraudulently Inscribed To Match Natural Diamond Report

A specimen seen in the Carlsbad lab for an updated diamond grading report does not match the previous documentation.

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Rough emerald with mobile inclusion.
Emerald with Mobile Inclusion

An emerald rough displays a large, multiphase inclusion suspended in fluid.

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