Vimsite

General Information:
 Chemical Formula:
CaB2O2(OH)4
 Composition:
(Molecular Weight = 161.73 gm)
Calcium 24.78 % Ca
Boron 13.37 % B 
Hydrogen 2.49 % H 
Oxygen 59.36 % O 
 Empirical Formula:
CaB2O2(OH)4
 IMA Status:
Approved IMA 1968
Physical Properties:
 Cleavage:
[???] Perfect
 Color:
colorless.
 Density:
2.54
 Diaphaniety:
Transparent
 Hardness:
4 - Fluorite
 Luster:
Vitreous (Glassy)
 Streak:
white
More details...