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Boulangerite & Galena

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TPX180700

Boulangerite & Galena

Classic Locality

Description Tabs

Description
Locality: 
Příbram District, Central Bohemian Region, Czech Republic
Size Range: 
Small cabinet (7-10 cm)
Size: 
8 × 3 × 5.5 cm
Description

This item presents a geode of galena completely covered with small needles of boulangerite.
The boulangerite was common in other times on this site, but today is a real rarity.
Here I present an example that comes from an old collection of the 1970s, but this specimen was from a previous collection. unfortunately labels are not preserved.

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

Galena

Formula: 
PbS
Strunz: 
2.CD.10
Crystal System: 
Isometric
Hardness: 
2.5
Colour: 
Lead-grey
Streak: 
Lead-grey

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