wolframite

American  

[wool-fruh-mahyt, vawl-] / ˈwʊl frəˌmaɪt, ˈvɔl- /

noun

1. 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.

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wolframite British  

/ ˈwʊlfrəˌmaɪt /

noun

1. 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

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Etymology

Origin of wolframite

First recorded in 1865–70; wolfram + -ite ¹

Example Sentences

The Democratic Republic of the Congo has abundant reserves of diamonds, gold, coltan, copper, tantalite, wolframite, manganese and uranium.

From US News • Jun. 13, 2014

Cassiterite, wolframite, coltan: they might be the spoiled offspring of celebrity parents, or characters from an unfamiliar fairytale.

From The Guardian • Aug. 27, 2010

They had done little with the colony's extensive deposits of iron ore, tin, antimony, wolframite, manganese and zinc.

From Time Magazine Archive

It seemed a cinch that neither Russia nor Germany would soon receive those particular tons of copper, tin, antimony, wolframite, molybdenite.

From Time Magazine Archive

The usual associates of the tin-stone are quartz, tourmaline, apatite, topaz, beryl, fluorite, lithia-mica, wolframite, chalcopyrite, &c.

From Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 4 "Carnegie Andrew" to "Casus Belli" by Various