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Wolframite

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PDM739414

Wolframite

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Description
Locality: 
Mangombe, Ibange, Maniema, DR Congo
Class: 
Crystal Group/Cluster
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.7 × 5.5 × 2.8 cm
Description

Tabular black crystal of “wolframite” from the Mangombe deposit in Congo, that was operated by Cobelmin (Compagnie Belge d'entreprises Minières).

Exchanged by Mr. Robert Verdoodt. He was working in the laboratories of UMHK in Lubumbashi, and travelled back to Belgium after the riots and the declaration of independence of Congo in 1960.

Mineral Data
What's on the rock

Wolframite

Synonym Of: 

Hübnerite

Formula: 
MnWO4
Strunz: 
4.DB.30
Hardness: 
4.0 - 4.5

Ferberite

Formula: 
FeWO4
Strunz: 
4.DB.30
Hardness: 
4.0 - 4.5
Formula: 
(Fe2+)WO4 to (Mn2+)WO4
Crystal System: 
Monoclinic
Hardness: 
4 - 4.5
Colour: 
Greyish-black
Streak: 
Reddish Brown

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