General Information:
Chemical Formula:
(Na,Ca,Mn)(Fe++,Mn)(Fe++,Fe+++,Mg)Al(PO4)3
IMA Status:
Approved IMA 1979
Physical Properties:
Cleavage:
[010] Perfect, [101] Distinct
Color:
bluish green, greenish black, gray green, or dark blue green.
Density:
3.6
Diaphaniety:
Transparent to Translucent
Hardness:
4 - Fluorite
Luster:
Vitreous - Metallic
Streak:
gray green
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