Wolframite
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Description: 

Wolframite contains iron, manganese and tungsten and is the main ore mineral of the metal tungsten.

It is found at many localities within Cornwall, in veins alongside cassiterite and closely associated with granites. Until the mid-19th century, wolframite was treated just as another impurity mineral or waste product. When the useful properties of tungsten metal (its hardness and density) were fully appreciated, it was found to be a valuable additive to alloys and steel. Demand rose quickly, particularly during the First World War, reflecting its use in the manufacture of armaments. Tungsten rapidly became a high-value by-product at many tin mines. East Pool was one of the four main producers of tungsten and pioneered production during the 1860s & 70s.

This specimen of wolframite and quartz is one of three specimens from Rogers lode at East Pool & Agar, gifted to the Royal Institution of Cornwall in 1916 by Jabez F Maynard, who was Secretary at the mine during the war years.

Chemical Formula: (Fe2+,Mn)WO4

Specimen no. TRURI: 1916.20.2
Location: East Pool mine
Grid Reference: SW 674 415

Mindat http://www.mindat.org/min-4305.html

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In Time
Accuracy:
Location precision: 
Good
Timescale:
Not known
Ma = Millions of years ago
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mineral
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