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Topaz, Aquamarine and Other Beryls from Klein Spitzkoppe, Namibia

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.

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An Update on Imperial Topaz from the Capao Mine, Minas Gerais, Brazil

The 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.

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Reactor-Irradiated Green Topaz

Examination of samples of faceted "Ocean green" topaz reveals that this material has been irradiated in a nuclear reactor.

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Thermal Alteration of Inclusions in "Rutilated" Topaz

Faceted colourless topaz containing acicular inclusions has been offered for sale as "rutilated" topaz.

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The Rutilated Topaz Misnomer

An examination of so-called "rutilated topaz."

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Gemstone Durability: Design to Display

A treatise on the design, display, care and repair of fine gemstones.

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"Modern" Jewellery: Retro to Abstract

A review of mid-20th century jewellery styles.

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Pink Topaz from Pakistan

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

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Altering the Colour of Topaz

A review of the various techniques in use today to change colourless topaz to a variety of hues.

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Gem-Bearing Pegmatites: A Review

A survey of the current gemmological knowledge of pegmatites, including the gem varieties aquamarine, tourmaline and topaz.

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