Reactor-Irradiated Green Topaz
Examination of samples of faceted "Ocean green" topaz reveals that this material has been irradiated in a nuclear reactor.
Abstracts; Summer 1991
From the Summer 1991 issue of Gems & Gemmology, a summary of important gemmology-related articles published in other journals.
Irradiated Topaz and Radioactivity
Large quantities of colourless topaz are currently being treated by gamma irradiation to turn them blue.
Altering the Colour of Topaz
A review of the various techniques in use today to change colourless topaz to a variety of hues.