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Sillimanite

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SHS72083

Sillimanite

Description Tabs

Description
Locality: 
Williamstown, Mount Lofty Ranges, South Australia, Australia
Size Range: 
Small miniature (3-4.5 cm)
Size: 
4 × 2.2 × 1.6 cm
Description

Sillimanite in matrix

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