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Calcite With Boulangerite Inclusions

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BEN965058

Calcite With Boulangerite Inclusions

Classic Locality

Description Tabs

Description
Locality: 
Herja Mine, Chiuzbaia, Baia Mare, Maramureș County, Romania
Class: 
Crystal Group/Cluster
Size Range: 
Small cabinet (7-10 cm)
Size: 
6 × 8 × 6.2 cm
Weight: 
233.00gr
Description

A cluster of globular growths.Crystals are lenticular rhombohedrons and they have its dark color due to the inclusion of fibrous boulangerite (or jamesonite! both are present in this mine, and in the same place) completely filling their interior.
Between some calcite crystals, we can see free boulangerite needles.
Calcite crystals show a good "velvet" luster and sharp terminations.
Pleasant shape, in very good condition.

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

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