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Type Locality
Laytonville Quarry ("Longvale"; "Longvale Quarry"), Laytonville, Coastal Range, Mendocino Co., California, USA
Mineral Data
Na(Fe,Mn)10(Fe,Al)2Si12O31(OH)13
Strunz: 
9.DH.65
Physical Properties
Hardness: 
0.0