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#jewelleryfacts365 188/365 Gem fact
Naturally occurring blue topaz is quite rare. Typically, colorless, gray or pale yellow and blue material is heat treated and irradiated to produce a more desired darker blue.
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| Classic Imperial Topaz. Size: 5 by 2.5 cm. Locality: Saramenha, Brazil. Collection: William Larson. Photo: Harold & Erica Van Pelt |
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