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Cuprotungstite Russellite Wolframite Molybdenite & Muscovite

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Cuprotungstite Russellite Wolframite Molybdenite & Muscovite

Classic Locality

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Description
Locality: 
Kara Oba, Karaganda Oblast, Kazakhstan
Class: 
Combination
Size Range: 
Thumbnail (1-3cm)
Size: 
2.7 × 2 × 1.2 cm
Description

Very nice, multimineral specimen from famous Kara Oba deposit in Kazakhstan - microcrystalline, light green Cuprotungstite, earthy masses of pale yellow Russellite, black "Wolframite" and metallic Molybdenite in Muscovite matrix. Nice, rarely seen combo from old collection.

Mineral Data
What's on the rock

Cuprotungstite

Formula: 
Cu2(WO4)(OH)2
Strunz: 
7.GB.15
Hardness: 
4.0 - 5.0
Type Locality: 
La Paz, Mun. de La Paz, Baja California Sur (BC Sur), Mexico

Russellite

Formula: 
Bi2WO6
Strunz: 
4.DE.15
Crystal System: 
Tetragonal
Hardness: 
3.5
Type Locality: 
Castle-an-Dinas Mine, Castle-an-Dinas, St Columb Major, St Austell District, Cornwall, England, UK

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

Molybdenite

Formula: 
MoS2
Strunz: 
2.EA.30
Crystal System: 
Hexagonal
Hardness: 
1.0 - 1.5

Muscovite

Formula: 
KAl2(AlSi3O10)(OH)2
Strunz: 
9.EC.15
Hardness: 
2.5
Streak: 
White

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