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Coronadite

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PDM586531

Coronadite

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Description
Locality: 
Bou Tazoult, Imini, Ouarzazate Province, Drâa-Tafilalet Region, Morocco
Class: 
Crystal Group/Cluster
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.7 × 3 × 1.5 cm
Description

Heavy, black lustrous botryoidal coronadite from the Bou Tazoult Mine. We collected this specimen in 09/2015. A process engineer of the nearby Imini Mine, where these materials are crashed, provided the determination of the material and told us about the difficulties of size reduction because its hardness and density. Uncommon material in the mineral market.

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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