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Polybasite

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JYJ95285

Polybasite

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Description
Locality: 
Tuscaroro District, Elko County, Nevada, United States of America
Size Range: 
Thumbnail (1-3cm)
Size: 
2.5 × 2.5 × 1.8 cm
Description

Nice aggregates of polybasite in cavernous matrix with old identification number at the backside.

Mineral Data
What's on the rock

Polybasite

Formula: 
[(Ag,Cu)6(Sb,As)2S7][Ag9CuS4]
Strunz: 
2.GB.15
Crystal System: 
Monoclinic - Prismatic
Hardness: 
2.5 - 3.0
Streak: 
black