Bearsite

General Information:
 Chemical Formula:
Be2(AsO4)(OH)·4(H2O)
 Composition:
(Molecular Weight = 246.01 gm)
Beryllium 7.33 % Be
Arsenic 30.45 % As
Hydrogen 3.69 % H 
Oxygen 58.53 % O 
 Empirical Formula:
Be2(AsO4)(OH)·4(H2O)
 Environment:
Oxidation zone of a polymetallic deposit.
 IMA Status:
Approved IMA 1962
 Locality:
Kazakhstan.
 Name Origin:
Named for the composition (Be, Arsenic).
Physical Properties:
 Color:
white.
 Density:
1.8 - 2, Average = 1.9
 Diaphaniety:
Translucent
 Habits:
Encrustations - Forms crust-like aggregates on matrix., Fibrous - Crystals made up of fibers., Striated - Parallel lines on crystal surface or cleavage face.
 Streak:
white
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