My watch list

Arthurite

Arthurite
Category	Phosphate minerals Arsenate minerals Vanadate minerals
Chemical formula	CuFe₂³⁺[(OH,O)(AsO₄,PO₄,SO₄)]₂·4H₂O
Identification
Color	Apple-green
Crystal system	monoclinic
Mohs Scale hardness	3-4
Luster	vitreous
Dispersion	r > v
Streak	not reported

Arthurite is a mineral with the chemical formula CuFe₂³⁺[(OH,O)|(AsO₄,PO₄,SO₄)]₂·4H₂O^[1]

In the monoclinic crystal system, it is apple-green in colour, with a Mohs hardness of 3-4, and a vitreous lustre.^[1]

Arthurite is named for the mineralogists Sir Arthur Russell and Arthur W. G. Kingsbury. ^[1]

The type locality is the Hingston Down Consols mine near Gunnislake in Cornwall, in the United Kingdom, where it was discovered in 1964.^[1]^[2]

References

^ ^a ^b ^c ^d http://www.mindat.org/min-376.html
^ Embrey, P. G.; Symes, R. F. [1987]. "The mines and mining", Minerals of Cornwall and Devon. London: British Museum (Natural History), p.58. ISBN 0565009893.