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Boulangerite In Calcite & Pyrrhotite

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PDM838917

Boulangerite In Calcite & Pyrrhotite

Description Tabs

Description
Locality: 
Herja Mine, Chiuzbaia, Baia Mare, Maramureș County, Romania
Class: 
Crystal Group/Cluster
Size Range: 
Small cabinet (7-10 cm)
Size: 
9 × 8.3 × 3.9 cm
Weight: 
370.00gr
Description

Metallic grey hairy boulangerite crystals included in half-spheroidal aggregates of tabular calcite rhombohedra. The group is well exposed all around, with magnetic tabular pyrrhotite crystals at the matrix. Even if some erosions are present at the edges of some calcite crystals it is an aesthetic specimen of hand size that weights 370g.

Acquired in 1993. Ex J. Muizebelt.

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Mineral Data
What's on the rock

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

Calcite

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

Pyrrhotite

Formula: 
Fe1-xS (x = 0 to 0.17)
Strunz: 
2.CC.10
Crystal System: 
Monoclinic
Hardness: 
3.5 - 4.0

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