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Earth lab datasite

Chalcophyllite
Arsenate with cuprite
hydrous copper aluminium arsenate
Cu18 Al2 (AsO4)3 (SO4)3 OH27
Scale bar = 1 centimetre
cleavage: Perfect
crystal system: hexagonal
hardness 2.0
relative density 2.6 - 2.7
Ting Tang, Cornwall
25 J 5