This article presents, for the first time, both gemmological and geologic information on topaz, aquamarine and other beryls from miarolitic pegmatites at Namibia’s historic Klein Spitzkoppe mineral locality.
Read MoreThe Capao mine is one of the oldest and most productive fully mechanised Imperial topaz mines in the historic Ouro Preto area of Minas Gerais, Brazil.
Read MoreThis article examines the history of the Ouro Preto district as well as the geology of the area and occurrence of the topaz.
Read MoreAn overview of the many types of gem-quality material, and its inclusions, currently found in Sri Lanka.
Read MoreLarge quantities of colourless topaz are currently being treated by gamma irradiation to turn them blue.
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