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Petarasite

Type Locality
Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry; Carrière Mont Saint-Hilaire), Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada
Mineral Data
Na5Zr2(Si6O18)(Cl,OH)·2H2O
Strunz: 
9.CJ.40
Physical Properties
Hardness: 
5.0 - 5.5