Gem-Bearing Pegmatites: A Review
A survey of the current gemmological knowledge of pegmatites, including the gem varieties aquamarine, tourmaline and topaz.
Pink Topaz from Pakistan
Pakistan has begun to produce fine gem-quality pink topaz.
The Capão Topaz deposit, Ouro Preto, Minas Gerais, Brazil
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
An overview of the many types of gem-quality material, and its inclusions, currently found in Sri Lanka.