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Chalcophanite & Pyrolusite

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SMM571247

Chalcophanite & Pyrolusite

Description Tabs

Description
Locality: 
Monte Zippiri Mine, Villasor, South Sardinia Province, Sardinia, Italy
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3 × 2 × 2 cm
Description

Many, deep red, lamellar aggregates of chalcophanite and some urchins of black aggregates of  pyrolusite crystals.

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

Pyrolusite

Formula: 
MnO2
Strunz: 
4.DB.05
Hardness: 
2.0 - 6.5

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