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Coronadite

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CHP933327

Coronadite

Classic Locality

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Description
Locality: 
Brosso Mine, Cálea, Léssolo, Torino Province, Piedmont, Italy
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.5 × 3 × 2 cm
Description

specimen with some very rappresentative black metallic needles of coronadite on matrix.

c.  4913

Mineral Data
What's on the rock

Coronadite

Formula: 
Pb(Mn64+Mn23+)O16
Strunz: 
4/D.08-70
Crystal System: 
Monoclinic
Hardness: 
4½ - 5
Colour: 
Dark gray, black
Type Locality: 
Horseshoe Mine, Coronado Mine, Coronado vein, Copper Plate Gulch, Copper Mountain District, Greenlee County, Arizona, USA
Isostructural with: 
Cryptomelane
Ferrihollandite
Hollandite
Manjiroite
Strontiomelane

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