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Selenite |
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selenite [′selĀ·ə‚nīt]
(mineralogy) The clear, colorless variety of gypsum crystallizing in the monoclinic system and occurring in crystals or in crystal mass. Also known as spectacle stone. selenite A variety of gypsum in transparent, foliated, crystalline form; used as decorative building stone. Selenite a mineral, a variety of gypsum with hairlike micro-crystals arranged in parallel fashion. Selenite is formed as a result of the filling of rock fissures, which accounts for the generally perpendicular arrangement of selenite fibers with respect to rock walls. It forms tightly bound mineral aggregates with a fiber length of up to 10–15 cm; the aggregates shimmer with an attractive silky luster in reflected light. The color of selenite depends on the admixture content and can be white, bluish white, yellow, or pink. Selenite is widely used as an ornamental material. Large selenite deposits are located in the Urals (Kungur, Sverdlovsk Oblast). Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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