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The mineral kyanite is an aluminium silicate of the sillimanite group (along with andalusite and sillimanite), also called alumino-silicate. It has the formula Al2O3·SiO2 (Al2SiO5). Its hardness varies widely depending on its crystallographic direction, from 5 to 7.5, and it has a specific gravity of 3.56-3.67.It is translucent, usually blue, but possibly white, gray, green, or black. It is usually found in long-bladed crystals or columnar to fibrous structures.
Kyanite is used in refractory and ceramic products. Noted deposits are found in Brazil, USA ( North Carolina, VirginiaVirginia is one of the original 13 states of the United States that revolted against British rule in the American Revolution and is generally classified as part of the South. Its official name is the Commonwealth of Virginia it is one of four Commonwealth, and GeorgiaThis article is about Georgia the U. For alternative meanings, see: Georgia. Georgia ( In Detail) (Full size) State motto: Wisdom, Justice, Moderation ''State nickname: Peach State or Empire of the South Other U. States Capital Atlanta Largest City Atlant), SwitzerlandThe Swiss Confederation or Switzerland is a landlocked federal state in central Europe, with neighbours Germany, France, Italy, Austria and Liechtenstein. The country has a strong tradition of political and military neutrality, but also of international c, RussiaThe Russian Federation ( Russian: , transliteration: Rossiyskaya Federatsiya or Rossijskaja Federacija , or Russia (Russian: , transliteration: Rossiya or Rossija , is a country that stretches over a vast expanse of eastern Europe and northern Asia. With, IndiaThe Republic of India is a large multicultural country in South Asia, with a population of over one billion. The Indian economy is the fourth largest in the world, in terms of purchasing power parity, and is the world's second-fastest growing economy. and KenyaKenya (pronounced KEN-ya; the pronunciation KEEN-ya is archaic) is a country of eastern Africa, bordering Ethiopia, Somalia, Sudan, Tanzania, Uganda and the Indian Ocean. Nairobi is its capital and largest city. Republic of Kenya ( In Detail) (Full size). Kyanite is found in such metamorphic rockMetamorphic rock is the result of the transformation of a pre-existing rock type, the protolith in a process called metamorphism (which means "change in form", derived from the Greek words meta, "change", and morphe, "form"), through which the protolith is as gneissGneiss is a common and widely distributed rock type formed by high grade regional metamorphic processes from preexisting formations that were originally either igneous or sedimentary rocks. Gneissic rocks are coarsely laminated and largely recrystallized and schist. The name "kyanite" is derived from the Greek word for "blue." It was originally named "Cyanite" for its (common, but not overall) blue hue. This name was later changed because kyanite doesn't only appear blue(green and black are common too).
See also: List of minerals
Minerals
Silicate minerals
