wolframite

[woo l-fruh-mahyt, vawl-]

noun

a mineral, iron manganese tungstate, (Fe,Mn)WO4, occurring in heavy grayish-black to brownish-black tabular or bladed crystals: an important ore of tungsten.

Also wolfram.

Origin of wolframite

First recorded in 1865–70; wolfram + -ite¹

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for wolframite

Historical Examples of wolframite

Before the war nearly half of the world's supply of tungsten ore (wolframite) came from Burma.
Creative Chemistry
Edwin E. Slosson

British Dictionary definitions for wolframite

wolframite

noun

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)WO 4

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