General Information:
 Chemical Formula:
NaCr+++Si2O6
 Composition:
(Molecular Weight = 227.15 gm)
Sodium 10.12 % Na
Chromium 22.89 % Cr
Silicon 24.73 % Si
Oxygen 42.26 % O 
 Empirical Formula:
NaCrSi2O6
 IMA Status:
Approved IMA
Physical Properties:
 Cleavage:
[110] Good
 Color:
emerald green.
 Density:
3.6
 Diaphaniety:
Transparent to Translucent
 Hardness:
6-7 - Orthoclase-Quartz
 Luster:
Vitreous (Glassy)
 Streak:
light green
More details...

General Information:
 Chemical Formula:
NaCr+++Si2O6
 Composition:
(Molecular Weight = 227.15 gm)
Sodium 10.12 % Na
Chromium 22.89 % Cr
Silicon 24.73 % Si
Oxygen 42.26 % O 
 Empirical Formula:
NaCrSi2O6
 IMA Status:
Approved IMA
Physical Properties:
 Cleavage:
[110] Good
 Color:
emerald green.
 Density:
3.6
 Diaphaniety:
Transparent to Translucent
 Hardness:
6-7 - Orthoclase-Quartz
 Luster:
Vitreous (Glassy)
 Streak:
light green
More details...