Reactor-Irradiated Green Topaz
Examination of samples of faceted "Ocean green" topaz reveals that this material has been irradiated in a nuclear reactor.
Gemstone Durability: Design to Display
A treatise on the design, display, care and repair of fine gemstones.
Thermal Alteration of Inclusions in "Rutilated" Topaz
Faceted colourless topaz containing acicular inclusions has been offered for sale as "rutilated" topaz.
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.