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Pink Topaz from Pakistan

Edward Gübelin, Giorgio Graziani, September 1, 1986

Pakistan has begun to produce fine gem-quality pink topaz.

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.

The Capão Topaz deposit, Ouro Preto, Minas Gerais, Brazil

Peter C. Keller, March 1, 1983

This article examines the history of the Ouro Preto district as well as the geology of the area and occurrence of the topaz.

Sri Lanka: The Gem Island

Peter C. Zwaan, June 1, 1982

An overview of the many types of gem-quality material, and its inclusions, currently found in Sri Lanka.