Zircon inclusions in sapphires from Madagascar were studied to investigate the effects of heat treatment on their gemmological and spectroscopic features.
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Sapphires from Russia’s Ilmen State Reserve may provide an insight into gem-quality corundum from secondary placers.
Read MoreA compilation of gem news from around the world, covering topics such as localities, unusual gem materials, market news, new products, discoveries, jewellery manufacturing techniques and industry trends.
Read MoreSeveral famous and historical gemstones in the Smithsonian's collection are examined and reported on.
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An exploration of the distinction between jadeite and omphacite, plus GIA's current policy concerning the definition of these stones.
Read MoreThis section, from the Summer 1999 issue of Gems & Gemmology, is a compilation of interesting finds from GIA’s laboratories.
Read MoreThis section, from the Summer 1996 issue of Gems & Gemmology, is a compilation of interesting finds from GIA’s laboratories.
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Sapphires from Baw Mar host multiphase inclusions in appealing patterns.
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This article, from the Summer 2009 issue of Gems & Gemmology, is a compilation of abstracts of important gemmology-related articles published outside of Gems & Gemmology.
Read MoreThis section, from the Summer 1992 issue of Gems & Gemmology, is a compilation of interesting finds from GIA's laboratories.
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