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Earth lab datasite

Turquoise
Phosphate on limonite
hydrous copper aluminium phosphate
Cu Al2 (PO4)4 OH8 ?
Scale bar = 1 centimetre
cleavage: Good
crystal system: Triclinic
hardness 5.0 - 6.0
relative density 2.6 - 2.8
Cornwall
25 H 9