General Information:
Chemical Formula:
(Ca,Na)(Mg,Fe++,Fe+++,Al)Si2O6
IMA Status:
Approved IMA 1987
Physical Properties:
Cleavage:
[110] Good
Color:
grass green or dark green.
Density:
3.29 - 3.39, Average = 3.34
Diaphaniety:
Translucent
Hardness:
5-6 - Between Apatite and Orthoclase
Luster:
Vitreous - Silky
Streak:
greenish white
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