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Trojanowska | 20:45 Tue 18th Sep 2007 | Science
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What colour is Topaz?
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Avatar Image mibn2cweus
Topaz is a semi-translucent typically golden brown with hues varying from clear to yellow orange pink red or purple depending on impurities present during formation of the crystal and treatments. Some turn blue when irradiated.
00:22 Wed 19th Sep 2007

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