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Pyrite With Sturtite On Calcite

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GND30028

Pyrite With Sturtite On Calcite

Classic Locality

Description Tabs

Description
Locality: 
Broken Hill, New South Wales, Australia
Size Range: 
Cabinet (10-18 cm)
Size: 
11 × 8.5 × 2.3 cm
Description

An unusual specimen from "The Hill" consisting of small pyrite crystals to 1-2mm with glossy black sturtite (a variety of hisingerite) on top of a plate of grey to white calcite.

The mineralogical interest lies in the pseudomorphing of limonite ? after bunches of radiating manganoan calcite (often labelled as kutnohorite) and the curious sturtite filled cores of the pyrite clusters.

Probably a North Mine specimen, this one is for those looking for something a bit different and challenging from Broken Hill.

Mineral Data
What's on the rock

Pyrite

Formula: 
FeS2
Strunz: 
2.EB.05a
Crystal System: 
Isometric
Hardness: 
6.0 - 6.5

Calcite

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