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Topaz

Mineral Data
Al2(SiO4)(F,OH)2
Strunz: 
9.AF.35
Physical Properties
Crystal System: 
Orthorhombic - Dipyramidal
Streak: 
White
Hardness: 
8.0
Tenacity: 
brittle
Synonyms
Synonyms: 
Topaze, Topas, Silver Topaz and Topazio
Photos