Images
Formula: CuFe3+2(AsO4)2(OH)2.4H2O
Hydrated arsenate containing hydroxyl,
arthurite group
Crystal System: Monoclinic
Specific gravity: 3.2
Hardness: 3 to 4
Colour: Apple-green, emerald-green, pale olive-green
Common impurities: P,S
Environments:
Arthurite is a rare secondary
arsenic-bearing mineral in the
oxidised zone of some copper deposits, formed by alteration of
arsenopyrite or
enargite, and associated with
pharmacosiderite,
scorodite,
conichalcite,
chenevixite,
chalcophyllite,
brochantite and
quartz
(HOM).
Localities
At the type locality, Hingston Down Consols, Cornwall, England, UK, arthurite is associated with
pharmacosiderite,
scorodite, other phosphates and
quartz
(Dana).
Arthurite from Hingston Down Consols - Image
At the Majuba Hill Mine, Antelope Mining District, Pershing County, Nevada, USA, tiny sprays of green arthurite have
been found
(Mindat photo).
Arthurite from Majuba Hill - Image
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