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

The mine can produce more than 16 tons of wolframite, a rock containing tungsten, in a week, police say.

From Washington Post

Add on conflict minerals such as cassiterite, gold, wolframite, cobalt and coltan from the Congo, plus the damage from huge pits and deep tunnels.

From The Guardian

Conflict minerals include coltan, cassiterite, gold and wolframite, and while you may not be familiar with some of these, they are widely used in electronics.

From New York Times

The minerals are gold, cassiterite, wolframite and columbite-tantalite, also called coltan.

From New York Times