Solution-Generated Pink Colour Surrounding Growth Tubes and Cracks in Blue to Blue-Green Copper-Bearing Tourmalines from Mozambique
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
A survey of the current gemmological knowledge of pegmatites, including the gem varieties aquamarine, tourmaline and topaz.
Interesting Red Tourmaline from Zambia
A new source of red tourmaline is identified in Zambia.
Gem Pegmatites of Minas Gerais, Brazil: The Tourmalines of the Governador Valadares District
A further article exploring tourmaline mines in another part of Minas Gerais.