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Benitoite

Type Locality
California State Gem Mine (Dallas Gem Mine; Benitoite Mine; Benitoite Gem Mine; Gem Mine), Dallas Gem Mine area, San Benito River headwaters area, New Idria District, Diablo Range, San Benito Co., California, USA
Mineral Data
BaTi(Si3O9)
Strunz: 
9.CA.05
Physical Properties
Crystal System: 
Hexagonal
Hardness: 
6.0 - 6.5