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andalusite

[an-dl-oo-sahyt] /ˌæn dlˈu saɪt/
noun, Mineralogy
1.
an orthorhombic form of aluminum silicate, Al 2 SiO 5 , found in schistose rocks.
Origin of andalusite
1830-1840
1830-40; named after Andalusia, where it was first found; see -ite1
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for andalusite
  • Rare minerals such as garnets, sillimanite, staurolite or andalusite can be common in places.
British Dictionary definitions for andalusite

andalusite

/ˌændəˈluːsaɪt/
noun
1.
a grey, pink, or brown hard mineral consisting of aluminium silicate in orthorhombic crystalline form. It occurs in metamorphic rocks and is used as a refractory and as a gemstone. Formula: Al2SiO5
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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andalusite in Science
andalusite
  (ān'də-l'sīt')   
A hard, grayish white to pinkish brown orthorhombic mineral. Andalusite occurs as nearly square prisms, often with cross-shaped cross sections, in metamorphic rocks. It is a polymorph of kyanite and sillimanite, but forms at shallower depths than they do, and at higher temperatures than kyanite and lower temperatures than sillimanite. Chemical formula: Al2SiO5.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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