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Coronadite

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GND85808

Coronadite

Classic Locality

Description Tabs

Description
Locality: 
Broken Hill, New South Wales, Australia
Size Range: 
Small cabinet (7-10 cm)
Size: 
7.5 × 5.5 × 5 cm
Description

Black stalactites of the lead manganese oxide coranadite form the entire specimen, with no other matrix. Some minor clay and calcite in association. Some stalactites are broken across but most are intact.

A very nice example of the species and typical of Broken Hill material.

Mineral Data
What's on the rock

Coronadite

Formula: 
Pb(Mn4+6Mn3+2)O16
Strunz: 
4.DK.05a
Hardness: 
4.5 - 5.0
Type Locality: 
Horse-Shoe shaft (Horseshoe Mine), Coronado Mine (Coronado Mining Co. property; Arizona Copper Co. group [in part]), Coronado vein, Copper Plate Gulch, Copper Mountain District (Clifton-Morenci District), Shannon Mts, Greenlee Co., Arizona, USA
Gondwana Minerals