| | TOPAZ Basic information More.. |
| Product Name: | TOPAZ | | Synonyms: | TOPAZ;CITRINE;Topaz, naturally occuring mineral, grains, approximately 0.06-0.19in;Tongs for crucible carrier | | CAS: | | | MF: | Al2SiO4(F,OH)2approximate | | MW: | 191.23 | | EINECS: | | | Mol File: | Mol File |  |
Use
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.
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TOPAZ
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