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Boulangerite

Type Locality
Molières, Gard, Languedoc-Roussillon, France
Mineral Data
Pb5Sb4S11
Strunz: 
2.HC.15
Physical Properties
Colour: 
Lead grey
Crystal System: 
Monoclinic
Streak: 
Brownish
Hardness: 
2.5 - 3.0
Tenacity: 
brittle