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Galena Calcite & Chalcopyrite

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CLB611739

Galena Calcite & Chalcopyrite

ex collection Uwe Niemeyer
Classic Locality

Description Tabs

Description
Locality: 
Cavnic Mine, Maramureș County, Romania
Class: 
Combination
Size Range: 
Cabinet (10-18 cm)
Size: 
13.5 × 10.5 × 6.5 cm
Weight: 
1 450.00gr
Description

Well, this specimen might not win a beautycontest, but it shows some pretty interesting features, beginning with the natural etching/skeletal structure on the galena crystal on the first picture. The calcite crystals are also pretty nice (Do I see a twin/interpenetration twin here?) and there is some shiny golden chalcopyrite, glossy black sphalerite and dirty-brown, minor siderite.

Mineral Data
What's on the rock

Galena

Formula: 
PbS
Strunz: 
2.CD.10
Crystal System: 
Isometric
Hardness: 
2.5
Colour: 
Lead-grey
Streak: 
Lead-grey

Calcite

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

Chalcopyrite

Formula: 
CuFeS2
Strunz: 
2.CB.10a
Crystal System: 
Tetragonal
Hardness: 
3.5 - 4.0

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