Dona M. Dirlam, Brendan M. Laurs, March 1, 2002
Liddicoatite, a calcium-rich lithium tourmaline, was recognised as a separate mineral species in 1977, and named in honour of Richard T. Liddicoat.
Read MoreWilliam B. (Skip) Simmons, et al., June 1, 2005
The Mt. Mica area in southwestern Maine has been mined for tourmaline and other pegmatite gems since the 1820s.
Read MoreMary L. Johnson, Cheryl Y. Wentzell, September 1, 1997
Tourmalines from an alluvial deposit near Lundazi in Zambia consist of colour-zoned pink/colourless/yellow-green “watermelon” nodules.
Read MoreFranz Brandstätter and Gerhard Niedermayr, September 1, 1994
Inclusions of native copper and tenorite (CuO) were found in greyish-green elbaite from São José da Batalha, Paraíba, Brazil.
Read MoreJames E. Shigley, Brian C. Cook, December 1, 2001
“Paraíba” tourmalines continue to be recovered in small amounts from north-eastern Brazil.
Read MoreKeith Proctor, March 1, 1985
This second article in the series on Minas Gerais describes the major tourmaline deposits which produce some of the finest specimens ever seen.
Read MoreJames E. Shigley and Anthony R. Kamp, June 1, 1984
A survey of the current gemmological knowledge of pegmatites, including the gem varieties aquamarine, tourmaline and topaz.
Read MoreMahinda Gunawardene and Mahinda S. Rupasinghe, June 1, 1986
The Elahera gem field currently provides approximately 35% of the gemstones exported from Sri Lanka.
Read MorePeter C. Zwaan, June 1, 1982
An overview of the many types of gem-quality material, and its inclusions, currently found in Sri Lanka.
Read MoreEmmanuel Fritsch, James E. Shigley, September 1, 1990
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.
Read MoreYou are being redirected to GIA Alumni Association, LLC.