Ushkovite

General Information:
 Chemical Formula:
MgFe+++2(PO4)2(OH)2·8(H2O)
 Composition:
(Molecular Weight = 504.08 gm)
Magnesium 4.82 % Mg
Iron 22.16 % Fe
Phosphorus 12.29 % P 
Hydrogen 3.60 % H 
Oxygen 57.13 % O 
 Empirical Formula:
MgFe3+2(PO4)2(OH)2·8(H2O)
 IMA Status:
Approved IMA
Physical Properties:
 Cleavage:
[010] Perfect
 Color:
brown, light yellow, or orange.
 Density:
2.38
 Diaphaniety:
Transparent
 Hardness:
3.5 - Copper Penny
 Luster:
Vitreous - Pearly
 Streak:
white
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