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Pyrite Sphalerite Ankerite & Quartz

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LCM38880

Pyrite Sphalerite Ankerite & Quartz

Description Tabs

Description
Locality: 
Barneycraig Mine, Coalcleugh, West Allendale, Northumberland, United Kingdom
Size Range: 
Small miniature (3-4.5 cm)
Size: 
4 × 3 × 1.5 cm
Largest Crystal: 
0.70cm
Description

Unusual twinned cubic pyrite alongside quartz and sphalerite with ankerite in the cavity.

Mineral Data
What's on the rock

Pyrite

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

Sphalerite

Formula: 
ZnS
Strunz: 
2.CB.05a
Crystal System: 
Isometric
Hardness: 
3.5 - 4.0

Ankerite

Formula: 
Ca(Fe2+,Mg)(CO3)2
Strunz: 
5.AB.10
Crystal System: 
Trigonal
Hardness: 
3.5 - 4.0
Streak: 
White
Type Locality: 
Styrian Erzberg, Eisenerz, Styria, Austria

Quartz

Formula: 
SiO2
Strunz: 
4.DA.05
Crystal System: 
Trigonal
Hardness: 
7.0
Streak: 
White
Lakeland Crystals and Minerals