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Turquoise
Name
Turquoise
Chemical
Formula
CuAl6(PO4)4(OH)8·4H2O
Species
Phosphates
Crystal
System
Triclinic
Mohs
Scale
5-6
Color
bright blue, sky-blue, pale green, blue-green, turquoise-blue, apple-green, green-gray
Luster
Vitreous, Waxy, Dull