Ferrobustamite

General Information:
 Chemical Formula:
Ca(Fe++,Ca,Mn)Si2O6
 Composition:
(Molecular Weight = 243.27 gm)
Calcium 21.42 % Ca
Manganese 2.26 % Mn
Iron 13.77 % Fe
Silicon 23.09 % Si
Oxygen 39.46 % O 
 Empirical Formula:
Ca1.3Fe2+0.6Mn2+0.1Si2O6
Physical Properties:
 Cleavage:
[100] Perfect, [001] Good, [102] Good
 Color:
green.
 Density:
3.09
 Diaphaniety:
Transparent to Translucent
 Hardness:
4.5-5
 Luster:
Vitreous (Glassy)
 Streak:
white
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