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smoky quartz

a smoky-yellow to dark brown or black variety of quartz, used as a gem.
Also called cairngorm, Cairngorm stone.
Origin of smoky quartz
1830-40 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for smoky quartz
  • Excellent crystals of smoky quartz and feldspar are found in vugs or cavities in the granite.
  • Another market for the crystals is as feed material to be irradiated to produce smoky quartz.
  • The only abundant minerals are milky-white perthitic microcline and dark-gray or blue smoky quartz.
British Dictionary definitions for smoky quartz

smoky quartz

another name for cairngorm
Word Origin
so named because of its colour
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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