A report on the colour treatment process for these intensely greenish yellow to yellowish-green cultured pearls and the techniques for identifying them.
Read MoreGIA’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).
Read MoreCharacterises the akoya cultured pearls produced on the eastern shoreline of Australia using native Pinctada imbricata fucata molluscs.
Read MoreExamination of pearls with a dominant purple hue, reportedly from the Spondylus calcifer mollusc.
Read MoreA sphere with unusual phosphorescence is seen in the Carlsbad laboratory.
Read MoreAbalone pearls submitted to the New York lab provide insight into the range of colours and shapes this type of mollusc can produce.
Read MoreThe distinction of natural from cultured pearls has traditionally been based on X-radiography.
Read MoreGIA’s 3-D modelling software is a powerful research tool for exploring and reconstructing the internal features of a pearl.
Read MoreDe 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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