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Geocronite & Boulangerite

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SMM788449

Geocronite & Boulangerite

Description Tabs

Description
Locality: 
Les Cougnasses Mine, Orpierre, Hautes-Alpes, Provence-Alpes-Cote d'Azur, France
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2 × 1.5 × 0.7 cm
Description

Many groups of dark metallic crystals of geocronite and acicular boulangerite, cute specimen.

Boxed with Label
Mineral Data
What's on the rock

Geocronite

Formula: 
Pb14(Sb,As)6S23
Strunz: 
2.JB.30a
Hardness: 
2.5 - 3.0
Type Locality: 
Sala Silver Mine, Sala, Västmanland, Sweden

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

Seller Information

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