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TOPAZ
- CAS:
- MF:
- Al2SiO4(F,OH)2approximate
- MW:
- 191.23
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topaz: A variably coloured aluminiumsilicate mineral,Al2(SiO4)(OH,F)2, that forms orthorhombiccrystals. It occurs chieflyin acid igneous rocks, such as granitesand pegmatites. Topaz is valuedas a gemstone because of its transparency,variety of colours (the wineyellowvariety being most highly prized), and great hardness (8 on theMohs’ scale). When heated, yellow orbrownish topaz often becomes arose-pink colour. The main sources oftopaz are Brazil, Russia, and the USA.
1 supplier list of "TOPAZ"
- Product Name:TOPAZ
- Company Type: Trader
- Country/Region: UNITED STATES
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