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In this study, the Bangkok laboratory examined five low-quality bead cultured pearls sourced directly from a local pearl factory and characterised their features before and after processing.
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Recently, GIA’s laboratory in New York had the opportunity to examine a fascinating pearl find and hear about an even more fascinating story.
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“The A-Z of Pearls”, with at least one pearl-related subject for each letter of the alphabet, was presented in Thailand recently.
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Examines the internal structure, chemical composition and spectroscopic features of 22 pen pearls.
Read MoreLearn more about pearl species, localities and growth, along with definitions for the 7 Pearl Value Factors™ and the terminology GIA uses to describe your pearl.
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The New York lab received four baroque-shaped pearls with damaged nacre layers
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A rare look at natural pearls from a known Spondylus species, commonly called “thorny” oysters.
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This giant clam pearl was noteworthy for its size and interesting colouration, and its pronounced banding when viewed with transmitted light.
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Fine-quality South Sea cultured pearls can be seen in the world’s fashion capitals, but they all start their journey to market at the auction. GIA offers a rare look inside one of the biggest.
Read MoreAn unusually large cultured pearl was filled with multiple cultured pearls, perhaps after the emergence of an original single-bead nucleus.
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