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Prehnite On Epidote

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CLB584598

Prehnite On Epidote

from seller's own West African trip 2011

Description Tabs

Description
Locality: 
Sandaré, Arrondissement Sandaré, Cercle de Nioro du Sahel, Kayes Region, Mali
Class: 
Combination
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.5 × 2.3 × 1.7 cm
Description

Very nice specimrn with  a translucent, botryoidal prehnite aggregate on a double-terminated dark green/black epidote crystal. The epidote shows an attachment mark at one termination.

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

Epidote

Formula: 
{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Strunz: 
9.BG.05a
Crystal System: 
Monoclinic
Hardness: 
6.0
Streak: 
Colorless
Type Locality: 
Bourg d'Oisans, Isère, Rhône-Alpes, France...

Seller Information

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