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[spes-er-tahyt] /ˈspɛs ərˌtaɪt/
Mineralogy. a yellow or red manganese-aluminum garnet, used as a semiprecious gem.
Also called spessartine
[spes-er-teen, -tin] /ˈspɛs ərˌtin, -tɪn/ (Show IPA)
1885-90; named after Spessart, a district in Bavaria, where it is found; see -ite1 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for spessartite


a brownish red garnet that consists of manganese aluminium silicate and is used as a gemstone. Formula: Mn3Al2(SiO4)3
Word Origin
C19: named after Spessart, mountain range in Germany
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Encyclopedia Article for spessartite


manganese aluminum garnet that is a semiprecious gem when clear. Found combined with almandine, it ranges in colour from pale orange yellow, when nearly pure, to orange or deep red, when appreciable proportions of almandine are present. It is similar in colour to grossular, but, unlike that species, it is commonly transparent. Spessartine is rare and, therefore, seldom used in jewelry. It is ordinarily found in granite, felsic lavas, pegmatite veins, and metamorphic rocks, as in central India, Madagascar, and Silver Cliff, Colo., U.S. For details of chemistry and occurrence, see garnet.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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