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vesuvianite

[vuh-soo-vee-uh-nahyt] /vəˈsu vi əˌnaɪt/
noun
1.
a mineral, chiefly a hydrous silicate of calcium and aluminum, commonly in tetragonal crystals and usually of a brown to green color; idocrase.
Origin
1885-1890
1885-90; Vesuvian + -ite1
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for vesuvianite

vesuvianite

/vɪˈsuːvɪəˌnaɪt/
noun
1.
a green, brown, or yellow mineral consisting of a hydrated silicate of calcium, magnesium, iron, and aluminium: it occurs as tetragonal crystals in limestones and is used as a gemstone. Formula: Ca10(Mg,Fe)2Al4Si9O34(OH)4 Also called idocrase, vesuvian
Word Origin
C19: first found in the lava of Vesuvius
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Encyclopedia Article for vesuvianite

idocrase

common silicate mineral that occurs in crystalline limestones near their contacts with igneous rocks, and in beds of marble and calcsilicate granulite that are associated with gneiss and mica schist. Fine glassy crystals coloured yellow, green, or brown have been found in the Ala Valley in the Piedmont, and on Mte. Somma, Italy; the Vilyuy River, Siberia; Christiansand, Nor.; Litchfield, Quebec; and Auburn, Maine, Amity, N.Y., and Franklin, N.J. For chemical formula and detailed physical properties, see silicate mineral (table)

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Word Value for vesuvianite

17
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