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Auriacusite

Type Locality
Black Pine Mine (Combination Mine; Black Pine tailings; Black Pine dump), Black Pine Ridge, John Long Mts, Philipsburg District (Flint Creek District), Granite Co., Montana, USA
Mineral Data
Fe3+Cu2+(AsO4)O
Strunz: 
8.BB.30
Physical Properties
Hardness: 
3.0 - 0.0
Tenacity: 
brittle