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Stewartite

Type Locality
Stewart Mine (MS 6162; Stewart Lithia mine), Tourmaline Queen Mountain (Pala Mtn; Queen Mtn), Pala, Pala District, San Diego Co., California, USA
Mineral Data
Mn2+Fe3+2(PO4)2(OH)2·8H2O
Strunz: 
8.DC.30
Physical Properties
Streak: 
White
Hardness: 
0.0
Tenacity: 
very brittle
Photos