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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Find out about how GIA is addressing industry concerns over undisclosed laboratory-grown and simulated fancy melee being mixed in with natural fancy melee.
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Webinars are an easy, informal way for GIA experts to share information and stay connected with the community of researchers and gem and jewellery lovers.
Read MoreGemmological photojournalist Robert Weldon shares the stories behind some of his favourite photos.
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GIA graduate Franco Valobra creates a commemorative brooch to recognise healthcare workers on the front line of the coronavirus battle for survival.
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G&G announces the winners of the Dr Edward J. Gübelin Most Valuable Article Awards for 2019.
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Dr James Shigley shares how GIA determines coloured stone origin and the mysteries of diamond origin.
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Explore GIA’s collection of free, rare digital books and manuscripts that document the history of gems and jewellery.
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The phrase “light performance” gets a lot of loose use in the diamond trade, but what does it mean when someone is actually looking at a diamond?
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