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Sillimanite

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NST705206

Sillimanite

Description Tabs

Description
Locality: 
Gunggl Valley, Zemmgrund, North Tyrol, Tyrol, Austria
Class: 
Massive/Crystalline
Size Range: 
Miniature (4.5-7 cm)
Size: 
6.8 × 4.5 × 4.5 cm
Description

A vein of radial sprays of Sillimanite from Gunggl Valley. Comes with a type written collection card dated back to Aug. 1974..
 

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
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