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Orlymanite

Type Locality
Wessels Mine (Wessel's Mine), Hotazel, Kalahari manganese field, Northern Cape Province, South Africa
Mineral Data
Ca4Mn3Si8O20(OH)6·2H2O
Strunz: 
9.EE.30
Physical Properties
Crystal System: 
Trigonal
Hardness: 
4.0 - 5.0