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Calcite Boulangerite & Chalcopyrite

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MGR547004

Calcite Boulangerite & Chalcopyrite

Description Tabs

Description
Locality: 
Herja Mine, Chiuzbaia, Baia Mare, Maramureș County, Romania
Class: 
Combination
Size Range: 
Miniature (4.5-7 cm)
Size: 
6.6 × 4.9 × 3.5 cm
Description

Superb, lustrous and sharp terminated jet-black calcite (dark color is caused by boulangerite inclusions) - they show spectacular and eye-catching contrast with intense golden, well formed chalcopyrite crystals. The assemble is more tridimensional in person. Very showy specimen! No significant damages to report, backside was on the rock.

Mineral Data
What's on the rock

Calcite

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

Boulangerite

Formula: 
Pb5Sb4S11
Strunz: 
2.HC.15
Crystal System: 
Monoclinic
Hardness: 
2.5 - 3.0
Colour: 
Lead grey
Streak: 
Brownish
Type Locality: 
Molières, Gard, Languedoc-Roussillon, France

Chalcopyrite

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