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Prehnite

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MGR767121

Prehnite

Floater

Description Tabs

Description
Locality: 
Djouga-Kolon, Bendougou, Bafoulabé Circle, Kayes Region, Mali
Class: 
Crystal Group/Cluster
Size Range: 
Small miniature (3-4.5 cm)
Size: 
4.4 × 2.1 × 2.1 cm
Description

The specimen is developed as floater and consist of 3 spheres in apple-green color. Photos were done with minor backlight. One nice detail: in the upper sphere you can see a black spot - this is a epidote crystal intergrown through the prehnite.

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