Gemstone Durability: Design to Display
Deborah Dupont Martin, June 1, 1987
A treatise on the design, display, care and repair of fine gemstones.
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Irradiated Topaz and Radioactivity
Robert Crowningshield, December 1, 1981
Large quantities of colourless topaz are currently being treated by gamma irradiation to turn them blue.
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