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smoky quartz

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smoky quartz

–noun
a smoky-yellow to dark brown or black variety of quartz, used as a gem.
Also called cairngorm, Cairngorm stone.


Origin:
1830–40
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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smoky quartz  
n.  A transparent or semitransparent brown or gray to nearly black variety of quartz, used as a gemstone. Also called cairngorm.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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