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Polybasite

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ESM620322

Polybasite

Description Tabs

Description
Locality: 
Valenciana Mine, Guanajuato, Guanajuato Municipality, Guanajuato, Mexico
Class: 
Crystal Group/Cluster
Size Range: 
Micromount (under 1cm)
Size: 
0.5 × 0.7 × 0.3 cm
Description

Metallic lustrous cluster of intergrown polybasite crystals

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