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Prehnite & Pyrite

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CLB520804

Prehnite & Pyrite

Description Tabs

Description
Locality: 
Djouga-Kolon, Bendougou, Bafoulabé Circle, Kayes Region, Mali
Class: 
Combination
Size Range: 
Small cabinet (7-10 cm)
Size: 
8 × 6.5 × 4.2 cm
Description

A glossy, 0.7 cm pyrite crystal in apple-green prehnite. The botryoidal prehnite aggregate shows very good micro crystal surfaces. The specimen is translucent all over.

The highlight, of course, is the pyrite crystal. You very rarely see one from Kayes.

Mineral Data
What's on the rock

Prehnite

Formula: 
Ca2Al2Si3O10(OH)2
Strunz: 
9.DP.20
Hardness: 
6.0 - 6.5
Streak: 
White
Type Locality: 
Karoo dolerites, Cradock, Chris Hani District, Eastern Cape Province, South Africa

Pyrite

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

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