The Carlsbad laboratory receives a very rare and fragile 3.09 ct brucite.
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Examination of a natural diamond reveals graining and zoning that resemble those of a laboratory-grown CVD diamond.
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Unusual natural pink diamonds displaying faint yellow color zoning and strong yellow fluorescence are studied in the Carlsbad laboratory.
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A brownish yellow cabochon submitted as cat’s-eye chrysoberyl is identified as artificial glass.
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A look at a 34.59 ct CVD-grown diamond examined at GIA’s Hong Kong laboratory.
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A new type of invisible marking in CVD diamonds suggests a possible security measure.
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Two pearls representing Indian deities were recently examined in the Mumbai laboratory.
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An exceptionally large South Sea bead cultured pearl is examined at GIA’s Mumbai laboratory.
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Analysis of internal structures in non-bead cultured pearls submitted to GIA’s Mumbai laboratory.
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past gems & gemology issues
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