Material submitted as a rough diamond is revealed through gemmological testing and analysis to be a near-colourless topaz.
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This section, from the Autumn 2009 issue of Gems & Gemology, is a compilation of interesting finds from GIA’s laboratories.
Read MoreThis section, from the Autumn 1997 issue of Gems & Gemology, is a compilation of interesting finds from GIA’s laboratories.
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This section, from the Summer 1991 issue of Gems & Gemmology, is a compilation of interesting finds from GIA’s laboratories.
Read MoreThis section, from the Winter 1995 issue of Gems & Gemmology, is a compilation of interesting finds from GIA’s laboratories.
Read MoreThis section, from the Summer 1985 issue of Gems & Gemmology, is a compilation of interesting finds from GIA’s laboratories.
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This article, from the Summer 2010 issue of Gems & Gemology, is a compilation of abstracts of important gemmology-related articles published outside Gems & Gemology.
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 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 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.
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