Silicate mineral, one of several phases in the aluminum silicate (Al2SiO5) system. Its colour ranges from gray-green to black or blue, with blue and blue-gray being most common. It occurs in Switzerland, Italy, the Ural Mountains, and New England (U.S.). Kyanite is a raw material in the manufacture of spark plugs. A clear, deep-blue variety is sometimes cut as a gemstone.
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Kyanite, whose name derives from the Greek word kyanos, meaning blue, is a typically blue silicate mineral, commonly found in aluminium-rich metamorphic pegmatites and/or sedimentary rock. Kyanite is a diagnostic mineral of the Blueschist Facies of metamorphic rocks.
Kyanite is a member of the aluminosilicate series, which also includes the polymorph andalusite and the polymorph sillimanite. Kyanite is strongly anisotropic, in that its hardness varies depending on its crystallographic direction. While this is a feature of almost all minerals, in kyanite this anisotropism can be considered an identifying characteristic.
Offering kyanite for the architectural market: Kyanite Mining Corp., the world's largest and oldest producer of the industrial mineral kyanite, is now offering the material in dimensional blocks, which can be processed for commercial and residential applications.(RE-EMERGING U.S. STONE INDUSTRY)
Aug 01, 2008; [ILLUSTRATION OMITTED] For decades, Kyanite Mining Corp. of Dillwyn, VA, has been quarrying the mineral Kyanite for...
Decompression Plagioclase Rims around Metastable Kyanite Crystals in Moldanubian Granulites - a Clue to Equilibration Volumes in Water-Deficient Metamorphic Rocks
Jan 01, 2005; Modem techniques of thermodynamic modeling and metamorphic condition estimates are critically dependent on knowledge of the...