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Chalcophanite

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CSL105772

Chalcophanite

Rare Mineral

Description Tabs

Description
Locality: 
Villia Mines, Plaka, Lavrion District, Attiki Prefecture, Greece
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.7 × 3.4 × 3.1 cm
Description

Chalcophanite is an uncommon Zn-Mn-oxide mineral. It forms black platy microcrystals which almost completely covers the specimen. Also brown rhombohedral crystals of siderite occurs on the specimen. Rich coverage and good size.

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
Loranth Minerals

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