The authors used Vis-NIR spectral measurements combined with LA-ICP-MS data to investigate the usefulness of absorption spectra.
Read MoreFrom the Summer 1991 issue of Gems & Gemmology, a summary of important gemmology-related articles published in other journals.
Read MoreGreen tourmaline from north-western Zambia show a growth pattern reminiscent of trapiche emerald/ruby when sliced perpendicular to the c-axis.
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This section, from the Summer 2009 issue of Gems & Gemmology, is a compilation of interesting finds from GIA’s laboratories.
Read MoreThe Mt. Mica area in southwestern Maine has been mined for tourmaline and other pegmatite gems since the 1820s.
Read MoreThis section, from the Summer 2005 issue of Gems & Gemmology, is a compilation of interesting finds from GIA's laboratories.
Read MoreAn overview of the many types of gem-quality material, and its inclusions, currently found in Sri Lanka.
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A coated Paraíba tourmaline is seen for the first time at a GIA lab.
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This section, from the Summer 1982 issue of Gems & Gemmology, is a compilation of interesting finds from GIA's laboratories.
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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