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ruby spinel

noun, Mineralogy
1.
a deep red, transparent variety of spinel, used as a gem.
Also called spinel ruby.
Origin
1830-1840
1830-40
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for ruby-spinel

ruby spinel

noun
1.
a red transparent variety of spinel, used as a gemstone
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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9
10
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