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Sillimanite

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SHS48752

Sillimanite

ex. Collection Dr. Winfried Boehmer (Wunstorf/Germany)

Description Tabs

Description
Locality: 
Benson Mines, Benson, Star Lake, St Lawrence County, New York, United States of America
Size Range: 
Miniature (4.5-7 cm)
Size: 
6.4 × 5.2 × 3.8 cm
Description

Red 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