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Prehnite & Epidote & Byssolite

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ESM692090

Prehnite & Epidote & Byssolite

Description Tabs

Description
Locality: 
Bourg d'Oisans, Isère, Auvergne-Rhône-Alpes, France
Class: 
Combination
Size Range: 
Miniature (4.5-7 cm)
Size: 
1.3 × 4.7 × 3.2 cm
Description

A green botryoidal prehnite crystal with olive green epidote crystals and byssolite needles

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...

Byssolite

Variety Of: 

Amphibole Supergroup

Formula: 
AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Hardness: 
0.0
Hardness: 
0.0