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Polybasite

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UVM833154

Polybasite

Classic Locality

Description Tabs

Description
Locality: 
Midway Mine, Tonopah, Nye County, Nevada, United States of America
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
5 × 2.7 × 2.5 cm
Description

Sharp microcrystals of polybasite on sulphide rich matrix from the Midway Mine, Tonopah, Nevada.   Decent specimens of almost anything are rare from this historic mining district.

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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