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Calcite & Coronadite

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RAF716204

Calcite & Coronadite

Rare Mineral

Description Tabs

Description
Locality: 
Skorpion Mine, Rosh Pinah, Oranjemund, Karas Region, Namibia
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
6.9 × 4.5 × 3.3 cm
Largest Crystal: 
0.40cm
Weight: 
126.00gr
Description

A very nice Calcite & Coronadite. This is a very beautiful specimen, the largest crystal on this specimen is 0.4cm. 

Mineral Data
What's on the rock

Calcite

Polymorph of: 
Formula: 
CaCO3
Strunz: 
5.AB.05
Crystal System: 
Trigonal
Hardness: 
3.0
Streak: 
White

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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