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Coloring of Topaz by Coating and Diffusion Processes: An X-Ray Photoemission Study of What Happens Beneath the Surface

Surface-treated topaz has become a viable alternative to topaz colored by irradiation.

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

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Altering the Color of Topaz

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

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Irradiated Topaz and Radioactivity

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

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The Radioactive Decay Pattern of Blue Topaz Treated by Neutron Irradiation

A systematic study of 15 neutron-irradiated blue topaz samples was conducted using high-purity germanium (HPGe) digital gamma-ray spectroscopy.

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