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Sillimanite & Feldspar

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SHS853729

Sillimanite & Feldspar

Description Tabs

Description
Locality: 
Kolsva, Köping, Västmanland County, Sweden
Class: 
Massive/Crystalline
Size Range: 
Small cabinet (7-10 cm)
Size: 
7 × 5.7 × 2.2 cm
Description

Nice yellow sillimanite in red feldspar

Mineral Data
What's on the rock

Sillimanite

Formula: 
Al2(SiO4)O
Strunz: 
9.AF.05
Crystal System: 
Orthorhombic
Hardness: 
6.5 - 7.5
Streak: 
white
Type Locality: 
Chester, Middlesex Co., Connecticut, USA

Feldspar

Group Parent: 
Feldspar Group