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Calcite & Boulangerite

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MGR1087749

Calcite & Boulangerite

Classic Locality

Description Tabs

Description
Locality: 
Herja Mine, Chiuzbaia, Baia Mare, Maramureș County, Romania
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
6.1 × 5 × 4.6 cm
Description

This material was found in the late 90ties and came only from one isolated small discovery. Probably the most famous stuff found in Romania - and unique world-wide, no other locality produced similar specimens. The Calcite crystals show curved edges an satiny luster - the formed a spherical aggregate - on side black, one side white. The dark color is caused by Boulangerite inclusions and this makes them unique! There are only a few specimen, which show this spherical assemble in combination with this unique zonings. And this one is even set on matrix. Minor Siderite is also present. 

The sphere is complete 360°, it is in excellent 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