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A clear, blue or blue-violet cordierite often used as a gemstone. Also called water sapphire.
[Greek ion, violet; see iodine + -lite (on the model of German Iolith : Greek ion + -lith, -lite, -lith).]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(Minerals) another name for cordierite
[C19: from Greek ion a violet + -lite]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014