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Wolframite

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PDM739415

Wolframite

Description Tabs

Description
Locality: 
Maniema, DR Congo
Class: 
Crystal Group/Cluster
Size Range: 
Small cabinet (7-10 cm)
Size: 
7.7 × 4.7 × 3.2 cm
Description

Black crystal group of crystallized wolframite with minor quartz and phyllosilicates. It comes from one of the most productive localities of wolframite in the DR Congo. Detailed information of this locality can be found at Prigogine, A. (1956) & Varlamoff, N. (1958). Extracted in the late 1950’s.

Ex. Gabriel Fauvart collection.

 

Prigogine, A. (1956). Concentration des minerais de wolfram et de niobium-tantale au Congo belge et au Ruanda-Urundi. 199pp.

Varlamoff, N. Les gisements de tungstène au Congo & Ruanda-Urundi. Matériaux pour l’étude de leur géologie & classification. Nat.Sc., (1958). T.VIII,2.

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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