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Polybasite

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SHS510820

Polybasite

Description Tabs

Description
Locality: 
Fresnillo de Gonzalez Echeverria, Fresnillo Municipality, Zacatecas, Mexico
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2 × 2 × 1.7 cm
Description

Nice polybasite on matrix

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
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