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Smithsonite On Coronadite

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CYF647942

Smithsonite On Coronadite

Description Tabs

Description
Locality: 
Kintore Open Cut, Broken Hill, New South Wales, Australia
Class: 
Crystals on Matrix
Size Range: 
Cabinet (10-18 cm)
Size: 
10 × 7 × 5 cm
Description

A broken Hill classic... Smithsonite on Coronadite. 

This specimen has numerous chatoyant smithsonites (often called rice grain smithsonite) dotted all over the piece.  The Coronadite has not shed from the matrix and displays well from many angles.

Mineral Data
What's on the rock

Smithsonite

Formula: 
ZnCO3
Strunz: 
5.AB.05
Hardness: 
4.0 - 4.5
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