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Franzinite

Type Locality
Case Collina (Toscopomici quarry), Pitigliano, Grosseto Province, Tuscany, Italy
Mineral Data
(Na,K)6Ca2(Al6Si6O24)(SO4)2·0.5H2O
Strunz: 
9.FB.05
Physical Properties
Streak: 
White
Hardness: 
5.0