General Information:
Chemical Formula:
(Fe++,Fe+++,Mg)2-3(Si,Al)2O5(OH)4
Physical Properties:
Color:
brown green, green yellow, or dark green.
Density:
3.03
Diaphaniety:
Translucent
Hardness:
2.5 - Finger Nail
Luster:
Pearly
Streak:
greenish white
More details...