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[woo l-fruh-mahyt, vawl-] /ˈwʊl frəˌmaɪt, ˈvɔl-/
a mineral, iron manganese tungstate, (Fe,Mn)WO 4 , occurring in heavy grayish-black to brownish-black tabular or bladed crystals: an important ore of tungsten.
Also, wolfram.
1865-70; wolfram + -ite1 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for wolframite
  • Scheelite and wolframite are the principal minerals currently mined for tungsten.
  • Large imperfect crystals of wolframite embedded in quartz and chalcopyrite.
  • Quartz-wolframite, quartz-sulfide, and quartz-carbonate stages are identified.
  • Two kinds of tungsten-bearing mineral rocks, called wolframite and scheelite, are mined commercially.
British Dictionary definitions for wolframite


a black to reddish-brown mineral consisting of tungstates of iron and manganese in monoclinic crystalline form: it occurs mainly in quartz veins and is the chief ore of tungsten. Formula: (Fe,Mn)WO4
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 wolframite

chief ore of tungsten, commonly associated with tin ore in and around granite. Such occurrences include Cornwall, Eng.; northwestern Spain and northern Portugal; eastern Germany; Myanmar (Burma); the Malay Peninsula; and Australia.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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