Solution-Generated Pink Colour Surrounding Growth Tubes and Cracks in Blue to Blue-Green Copper-Bearing Tourmalines from Mozambique
John I. Koivula, Kevin Nagle, Andy Hsi-Tien Shen, and Philip Owens
Several transparent, faceted, blue to blue-green copper-bearing tourmalines containing growth tubes and cracks surrounded by sleeves of pink colour were examined for this report.
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Gem-Bearing Pegmatites: A Review
James 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.
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Interesting Red Tourmaline from Zambia
John I. Koivula and C. W. Fryer, March 1, 1985
A new source of red tourmaline is identified in Zambia.
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Gem Pegmatites of Minas Gerais, Brazil: The Tourmalines of the Governador Valadares District
Keith Proctor, June 1, 1985
A further article exploring tourmaline mines in another part of Minas Gerais.
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