Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A hard, grayish white to pinkish brown mineral (Al2SiO5), occurring as nearly square prisms, often with cruciform cross sections, in metamorphic rock.
from The Century Dictionary.
- noun A mineral of a gray, green, bluish, flesh, or rose-red color, consisting of anhydrous silicate of aluminium, sometimes found crystallized in four-sided rhombic prisms.
from the GNU version of the Collaborative International Dictionary of English.
- noun (Min.) A silicate of aluminium, occurring usually in thick rhombic prisms, nearly square, of a grayish or pale reddish tint. It was first discovered in Andalusia, Spain.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun mineralogy An
aluminium nesosilicate mineral , Al2SiO5.
Etymologies
from The American Heritage® Dictionary of the English Language, 4th Edition
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Examples
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Kyanite and its related mineral “cousins,” sillimanite and andalusite, are called polymorphs.
Kyanite 2008
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"The quartzite shows granoblastic and blastopsammitic texture, with grain sizes varying from coarse sand to very fine pebble and with minor microcrystals of sericite, fuchsite, andalusite and iron oxide, besides detrital tourmaline, rutile, and zircon." link
Archive 2008-03-01 ReBecca Foster 2008
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South Africa supplies most of the andalusite imported for industrial consumption in the United States.
Kyanite 2008
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Relative to one another, kyanite forms in a lower temperature/higher pressure environment; andalusite forms in a lower temperature/lower pressure environment, and sillimanite forms in a higher temperature/higher pressure environment.
Kyanite 2008
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"The quartzite shows granoblastic and blastopsammitic texture, with grain sizes varying from coarse sand to very fine pebble and with minor microcrystals of sericite, fuchsite, andalusite and iron oxide, besides detrital tourmaline, rutile, and zircon." link
Geological Definition of the Day (#2) ReBecca Foster 2008
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France and India also produce andalusite and kyanite, respectively.
Kyanite 2008
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Alluvial diamonds, uranium, lime, andalusite and platinum occur in abundance.
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The local and export sales of industrial minerals revealed variable trends, with export revenues from the sale of vermiculite and granite declining considerably, and those for andalusite and phosphate rock increasing.
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Local and export sales of industrial minerals showed variable trends, with export revenues from the sale of vermiculite and granite declining considerably, and those for andalusite and phosphate rock increasing.
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Silimanite is found mainly in India while andalusite and kyanite are more widespread.
1. Refractories 1987
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