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Chalcophanite & Calcite

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AST654634

Chalcophanite & Calcite

Description Tabs

Description
Locality: 
Esperanza Mine, Lavrion District, Attiki Prefecture, Greece
Class: 
Crystals on Matrix
Size Range: 
Cabinet (10-18 cm)
Size: 
10 × 6.8 × 5 cm
Description

Sparkling lead gray chalcophanite crystals on matrix surfaces and cavities all around the specimen.On main display there is also a layer of lustrous calcite crystals partly covering chalcophanite.Very rich specimen that can be trimmed to more miniature specimens.

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

Calcite

Polymorph of: 
Formula: 
CaCO3
Strunz: 
5.AB.05
Crystal System: 
Trigonal
Hardness: 
3.0
Streak: 
White

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