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[kahy-uh-nahyt] /ˈkaɪ əˌnaɪt/
a mineral, aluminum silicate, Al 2 SiO 5 , occurring in blue or greenish bladed triclinic crystals, used as a refractory.
Also, cyanite.
1785-95; irregular < Greek kýan(os) cyan + -ite1 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for kyanite
  • Statistics and information on the worldwide supply, demand, and flow of kyanite mullite.
  • US kyanite were averaged to estimate unit value for kyanite.
  • Several abandoned gold mines and significant reserves of kyanite are located within the area.
  • kyanite forms in metamorphic rocks at moderate temperature and high pressure.
British Dictionary definitions for kyanite


a grey, green, or blue mineral consisting of aluminium silicate in triclinic crystalline form. It occurs in metamorphic rocks and is used as a refractory. Formula AL2SiO5
Derived Forms
kyanitic (ˌkaɪəˈnɪtɪk) adjective
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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kyanite in Science
A bluish-green to colorless triclinic mineral. Kyanite occurs as long, thin, blade-shaped crystals in metamorphic rocks. It is unique among minerals in having two grades of hardness, one along its length, and one along its width. It is a polymorph of andalusite and sillimanite, but can form at lower temperatures than either of these. Chemical formula: Al2SiO5.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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