General Information:
Chemical Formula:Pb(Bi,Sb)6S10
Locality:Ustarasaisk deposit, western Tian-Shan, Kazakhstan.
Name Origin:Named for the locality.
Physical Properties: Cleavage:[???] Perfect
Color:gray or silver gray.
Diaphaniety:Opaque
Habits:Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline)., ,
Hardness:2.5 - Finger Nail
Luster:Metallic
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