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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.

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.

Abstracts; Summer 1991

Dona M. Dirlam

From the Summer 1991 issue of Gems & Gemmology, a summary of important gemmology-related articles published in other journals.