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.
Read MoreRecently, GIA’s laboratory in New York had the opportunity to examine a fascinating pearl find and hear about an even more fascinating story.
Read More“The A-Z of Pearls”, with at least one pearl-related subject for each letter of the alphabet, was presented in Thailand recently.
Read MoreExamines 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.
Read MoreThe New York lab received four baroque-shaped pearls with damaged nacre layers
Read MoreA rare look at natural pearls from a known Spondylus species, commonly called “thorny” oysters.
Read MoreThis giant clam pearl was noteworthy for its size and interesting colouration, and its pronounced banding when viewed with transmitted light.
Read MoreFine-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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