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Chalcophanite

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SMM743289

Chalcophanite

Description Tabs

Description
Locality: 
Mount Argentiera Mine, Calabona, Sassari Province, Sardinia, Italy
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2.5 × 1.5 × 1.5 cm
Description

 Groups of many, metallic-black, shiny like mirror, tabular sharp crystals of chalcophanite. Very good.

Boxed with Label
Mineral Data
What's on the rock

Chalcophanite

Formula: 
(Zn,Fe,Mn)Mn3O7·3H2O
Strunz: 
4.FL.20
Crystal System: 
Trigonal
Hardness: 
2.5
Type Locality: 
Passaic pit (Marshall Mine; Passaic Mine), Sterling Hill, Ogdensburg, Franklin Mining District, Sussex Co., New Jersey, USA

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