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almandine

[al-muh n-deen, -dahyn, -din] /ˈæl mənˌdin, -ˌdaɪn, -dɪn/
noun
1.
a mineral, red iron aluminum garnet.
Origin
1670-1680
1670-80; < French, Middle French < Medieval Latin alamandīna, alabandīna a precious stone, probably a kind of garnet, equivalent to Alaband(a) a town in Asia Minor + -īna, feminine of -īnus -ine1; compare Middle English alabaundaryne, alemaundine; cf. alabandite
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for almandine
  • They vary in color from pale to dark tints, including the deep violet-red of the almandine garnet.
  • They are differentiated primarily on the presence or absence of almandine garnet.
British Dictionary definitions for almandine

almandine

/ˈælməndɪn; -ˌdaɪn/
noun
1.
a deep violet-red garnet that consists of iron aluminium silicate and is used as a gemstone. Formula: Fe3Al2(SiO4)3
Word Origin
C17: from French, from Medieval Latin alabandīna, from Alabanda, ancient city of Asia Minor where these stones were cut
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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Encyclopedia Article for almandine

either of two semiprecious gemstones: a violet-coloured variety of ruby spinel (q.v.) or iron aluminum garnet, which is most abundant of the garnets. Specimens of the garnet, frequently crystals, contain up to 25 percent grossular or andradite and are commonly brownish red; gem-quality stone is deep red and slightly purple. Almandine, the so-called precious garnet, is most often faceted for rings. Cabochon-cut (rounded, convex polished surface), deep red almandine is called carbuncle; its base is often hollowed to lighten its colour. When rutile needles are included in the almandine, the cabochons often show a four-rayed asterism (star-shaped figure)

Learn more about almandine with a free trial on Britannica.com
Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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