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Andalusite

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MGR748453

Andalusite

Description Tabs

Description
Locality: 
Lüsens Valley, Tyrol, Austria
Class: 
Crystal Group/Cluster
Size Range: 
Small cabinet (7-10 cm)
Size: 
7.6 × 4 × 3.7 cm
Description

A brown to steel-bluegrey, sharply formed free-standing prismatic terminated andalusite crystal in remarkable dimension. More rare mineral from a very uncommon locality.

Mineral Data
What's on the rock

Andalusite

Formula: 
Al2(SiO4)O
Strunz: 
9.AF.10
Crystal System: 
Orthorhombic
Hardness: 
6.5 - 7.5
Streak: 
White
Type Locality: 
El Cardoso de la Sierra, Guadalajara, Castile-La Mancha, Spain