General Information:
Chemical Formula:
(Y,Ca)5(SiO4,PO4)3(OH,F)
IMA Status:
Approved IMA 1987
Physical Properties:
Cleavage:
None
Color:
reddish brown or black.
Density:
4.25
Diaphaniety:
Translucent to Opaque
Hardness:
5 - Apatite
Luster:
Adamantine
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