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Calcite & Boulangerite

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KOV759963

Calcite & Boulangerite

Rare Mineral

Description Tabs

Description
Locality: 
Herja Mine, Chiuzbaia, Baia Mare, Maramureș County, Romania
Class: 
Combination
Size Range: 
Micromount (under 1cm)
Size: 
0.8 × 0.8 × 0.8 cm
Weight: 
1.00gr
Description

Black and white Calcite from Herja which is a real rarity from the locale. The balck color genesis is due to a Boulangerite mass, as half of the Calcite was grown in it. Excellent miniature of classic black& white Calcite from Herja, Romania. Black Calcite were popular when the mines were active, but nowadays only seldomly seen even at auctions. Interesting paragenesis and crystallization, very aesthetic miniature with superb details.

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