Liddicoatite Tourmaline from Anjanabonoina, Madagascar
Liddicoatite, a calcium-rich lithium tourmaline, was recognised as a separate mineral species in 1977, and named in honour of Richard T. Liddicoat.
Mt. Mica: a renaissance in Maine’s gem tourmaline production
The Mt. Mica area in southwestern Maine has been mined for tourmaline and other pegmatite gems since the 1820s.
Multicoloured Bismuth-bearing Tourmaline from Lundazi, Zambia
Tourmalines from an alluvial deposit near Lundazi in Zambia consist of colour-zoned pink/colourless/yellow-green “watermelon” nodules.
Copper and tenorite inclusions in cuprian-elbaite tourmaline from Paraíba, Brazil
Inclusions of native copper and tenorite (CuO) were found in greyish-green elbaite from São José da Batalha, Paraíba, Brazil.
An Update on “Paraíba” Tourmaline from Brazil
“Paraíba” tourmalines continue to be recovered in small amounts from north-eastern Brazil.
Gem pegmatites of Minas Gerais, Brazil: the tourmalines of the Araçuaí districts
This second article in the series on Minas Gerais describes the major tourmaline deposits which produce some of the finest specimens ever seen.
Gem-Bearing Pegmatites: A Review
A survey of the current gemmological knowledge of pegmatites, including the gem varieties aquamarine, tourmaline and topaz.
The Elahera Gem Field in Central Sri Lanka
The Elahera gem field currently provides approximately 35% of the gemstones exported from Sri Lanka.
Sri Lanka: The Gem Island
An overview of the many types of gem-quality material, and its inclusions, currently found in Sri Lanka.
Gem-quality cuprian-elbaite tourmalines from São José Da Batalha, Paraíba, Brazil
Unusually 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.