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Sanidine

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Sanidine

Description Tabs

Description
Locality: 
Roc de Courlande, Chastreix, Monts-Dore, Puy-de-Dôme, Auvergne-Rhône-Alpes, France
Class: 
Crystal Group/Cluster
Size Range: 
Miniature (4.5-7 cm)
Size: 
1.28 × 5.09 × 4.88 cm
Description

Carlsbad Twin of Sanidine from Massif Central, France.  Good lustre to both faces with no matrix.

Classic French locality.

Ex Dr Trevor Devon collection.

Mineral Data
What's on the rock

Sanidine

Formula: 
KAlSi3O8
Strunz: 
9.FA.30
Crystal System: 
Monoclinic - Prismatic
Hardness: 
6.0
Streak: 
White
Type Locality: 
Drachenfels, Königswinter, Siebengebirge, North Rhine-Westphalia, Germany

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