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Related to rock crystal: rose quartz
Colorless transparent quartz, used in optical instruments and as a semiprecious gemstone.
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) a pure transparent colourless quartz, used in electronic and optical equipment. Formula: SiO2
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
transparent quartz, esp. when colorless.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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|Noun||1.||rock crystal - a clear quartz used in making electronic and optical equipment|
quartz - a hard glossy mineral consisting of silicon dioxide in crystal form; present in most rocks (especially sandstone and granite); yellow sand is quartz with iron oxide impurities
rhinestone - an imitation diamond made from rock crystal or glass or paste
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