General Information:
Chemical Formula:
(Na,Ca,Mn++)(Mn++,Fe++)(Fe++,Fe+++,Mg)Al(PO4)3
IMA Status:
Approved IMA 1973
Physical Properties:
Cleavage:
None
Color:
bluish green, greenish black, gray green, or dark green.
Density:
3.601
Diaphaniety:
Transparent to Translucent
Hardness:
4-4.5 - Between Fluorite and Apatite
Luster:
Vitreous - Metallic
Streak:
olive green
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