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Sanidine

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PDM803684

Sanidine

Floater

Description Tabs

Description
Locality: 
Roc de Courlande, Chastreix, Monts-Dore, Puy-de-Dôme, Auvergne-Rhône-Alpes, France
Class: 
Single Crystal
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.7 × 3.2 × 1.4 cm
Description

Floater complete idiomorph crystal of sanidine with good lustre and nice hopper faces, which is very rare in this species.

Acquired in 2002. Ex Jan Sibtsen #1712.

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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