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Coronadite

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PDM876245

Coronadite

Description Tabs

Description
Locality: 
Bou Tazoult, Imini, Ouarzazate Province, Drâa-Tafilalet Region, Morocco
Class: 
Crystal Group/Cluster
Size Range: 
Small miniature (3-4.5 cm)
Size: 
4.3 × 3.1 × 2.4 cm
Weight: 
52.00gr
Description

Dense black lustrous botryoidal coronadite from the Bou Tazoult Mine. At the rear side, it is evident the organization of the crystals with a subparallel multilayered distribution.

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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