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Semseyite

Type Locality
Baia Sprie mine (Felsöbánya mine), Baia Sprie (Felsöbánya), Maramureș Co., Romania
Mineral Data
Pb9Sb8S21
Strunz: 
2.HC.10d
Physical Properties
Streak: 
Black
Hardness: 
2.5
Tenacity: 
brittle