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Pyrite Wolframite & Quartz

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CLB53446

Pyrite Wolframite & Quartz

Description Tabs

Description
Locality: 
Kara Oba, Karaganda Oblast, Kazakhstan
Size Range: 
Small cabinet (7-10 cm)
Size: 
3.5 × 9 × 6.8 cm
Largest Crystal: 
2.00cm
Description

 Two "cuts" in the pyrite-covering of the quartz crystals show some wolframite in a pseudomorph of quartz after barite.

More wolframite shows on the backside. The pyrite crystals are well-developed.

Mineral Data
What's on the rock

Pyrite

Formula: 
FeS2
Strunz: 
2.EB.05a
Crystal System: 
Isometric
Hardness: 
6.0 - 6.5

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

Quartz

Formula: 
SiO2
Strunz: 
4.DA.05
Crystal System: 
Trigonal
Hardness: 
7.0
Streak: 
White

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