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Epidote & Adularia

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Epidote & Adularia

Classic Locality

Description Tabs

Description
Locality: 
Sedrun, Tujetsch, Surselva Region, Grisons, Switzerland
Class: 
Combination
Size Range: 
Small cabinet (7-10 cm)
Size: 
7.3 × 4.6 × 3.8 cm
Description

Possibly the best Alpine epidote specimen I had so far. Lots of elongated, translucent, dark moss-green epidote crystals up to about 0.8 cm on matrix with strangely shaped, white, glossy adularia crystals (I'm not 100% sure about adularia - really strange crystals).

Mineral Data
What's on the rock

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...

Adularia

Formula: 
KAlSi3O8
Strunz: 
9.FA.30
Crystal System: 
Monoclinic
Hardness: 
6 Ortho - clase

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