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A green to brown or black calcium-iron garnet, Ca3Fe2(SiO4)3.
[After José Bonifácio de Andrada e Silva.]
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 yellow, green, or brownish-black garnet that consists of calcium iron silicate and is used as a gemstone. Formula: Ca3Fe2(SiO4)3
[C19: named after J. B. d'Andrada e Silva (1763–1838), Brazilian mineralogist; see -ite1]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
a garnet occurring in brown, green, or black crystals.
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.||andradite - a garnet consisting of calcium iron silicate and having any color ranging from yellow and green to brown and black; used as gemstone|
garnet - any of a group of hard glassy minerals (silicates of various metals) used as gemstones and as an abrasive
demantoid - a green andradite used as a gemstone
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