GIA’s services and instruments have grown in importance and impact as new gem treatments and laboratory-grown gems have entered the market.
Read MoreCompares the image quality provided by real-time microradiographic imaging (RTX) units fitted with two different detectors: an image intensifier (II) and a flat panel detector (FPD).
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Characterises the akoya cultured pearls produced on the eastern shoreline of Australia using native Pinctada imbricata fucata molluscs.
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Examination of pearls with a dominant purple hue, reportedly from the Spondylus calcifer mollusc.
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A report on the colour treatment process for these intensely greenish yellow to yellowish-green cultured pearls and the techniques for identifying them.
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A sphere with unusual phosphorescence is seen in the Carlsbad laboratory.
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Abalone pearls submitted to the New York lab provide insight into the range of colours and shapes this type of mollusc can produce.
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The distinction of natural from cultured pearls has traditionally been based on X-radiography.
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GIA’s 3-D modelling software is a powerful research tool for exploring and reconstructing the internal features of a pearl.
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De Beers reduces rough prices at May sight, undisclosed treated diamonds submitted to GIA, and Sotheby’s and Christie’s sales break auction records − again.
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