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Arthurite

Type Locality
Hingston Down Consols, Clitters United Mines, Gunnislake, Calstock, Callington District, Cornwall, England, UK
Mineral Data
CuFe3+2(AsO4)2(OH)2·4H2O
Strunz: 
8.DC.15
Physical Properties
Crystal System: 
Orthorhombic
Hardness: 
3.0 - 4.0