The authors used Vis-NIR spectral measurements combined with LA-ICP-MS data to investigate the usefulness of absorption spectra.
Read MoreUnusually vivid tourmalines from the state of Paraiba, in north-eastern Brazil, have attracted great interest since they first appeared on the international gem market in 1989.
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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Identifies 13 copper-bearing tourmalines, which have traditionally been assumed to be elbaite species, as liddicoatite.
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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 MoreTourmalines from an alluvial deposit near Lundazi in Zambia consist of colour-zoned pink/colourless/yellow-green “watermelon” nodules.
Read MoreA treatise on the design, display, care and repair of fine gemstones.
Read MoreA survey of the current gemmological knowledge of pegmatites, including the gem varieties aquamarine, tourmaline and topaz.
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