Cornubite

Formula: Cu5(AsO4)2(OH)4

Colour: Apple green, light to dark green

Lustre: Sub-Vitreous, Resinous, Waxy, Greasy

Hardness: 4

Specific Gravity: 4.64

Crystal System: Triclinic

Name: Named in 1959 by Gordon Frank Claringbull, Max H. Hey and Arthur Russell for Cornubia, the medieval Latin name for Cornwall.

Type Locality: Wheal Carpenter, Fraddam, Gwinear-Gwithian, Cornwall, England, UK

Dimorph of: Cornwallite