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Cuspidine

Type Locality
Monte Somma, Somma-Vesuvius Complex, Naples Province, Campania, Italy
Mineral Data
Ca4(Si2O7)(F,OH)2
Strunz: 
9.BE.17
Physical Properties
Streak: 
White
Hardness: 
5.0 - 6.0
Tenacity: 
brittle