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Quartz Calcite & Wolframite

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ESM757896

Quartz Calcite & Wolframite

Description Tabs

Description
Locality: 
Cavnic Mine, Maramureș County, Romania
Class: 
Combination
Size Range: 
Museum (18cm plus)
Size: 
20 × 6 × 4 cm
Description

Lustrous stacked quartz crystals hosting colorless calcite crystals and lustrous black wolframite crystals

Mineral Data
What's on the rock

Quartz

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

Calcite

Polymorph of: 
Formula: 
CaCO3
Strunz: 
5.AB.05
Crystal System: 
Trigonal
Hardness: 
3.0
Streak: 
White

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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