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Andalusite

Type Locality
El Cardoso de la Sierra, Guadalajara, Castile-La Mancha, Spain
Mineral Data
Al2(SiO4)O
Strunz: 
9.AF.10
Physical Properties
Crystal System: 
Orthorhombic
Streak: 
White
Hardness: 
6.5 - 7.5
Tenacity: 
brittle
Synonyms
Synonyms: 
ANDALUZITE and Andalucita