The 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 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 MoreThe Elahera gem field currently provides approximately 35% of the gemstones exported from Sri Lanka.
Read MoreA survey of the current gemmological knowledge of pegmatites, including the gem varieties aquamarine, tourmaline and topaz.
Read MoreAn overview of the many types of gem-quality material, and its inclusions, currently found in Sri Lanka.
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