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.
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.
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.
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.