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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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Abstracts; Summer 1991

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

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Irradiated Topaz and Radioactivity

Large quantities of colourless topaz are currently being treated by gamma irradiation to turn them blue.

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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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