General Information:
Chemical Formula:
Ca0.3(Cr+++,Mg,Fe+++)2(Si,Al)4O10(OH)2·4(H2O)
IMA Status:
Approved IMA
Physical Properties:
Cleavage:
[???] Perfect
Color:
yellow, olive green, or green.
Density:
2 - 2.5, Average = 2.25
Diaphaniety:
Subopaque
Hardness:
1.5-2 - Talc-Gypsum
Luster:
Resinous
Streak:
blue green
More details...