Harkerite

General Information:
 Chemical Formula:
Ca24Mg8Al2(SiO4)8(BO3)6(CO3)10·2(H2O)
 Composition:
(Molecular Weight = 3,288.76 gm)
Calcium 29.25 % Ca
Magnesium 5.91 % Mg
Aluminum 1.64 % Al
Silicon 6.83 % Si
Boron 3.94 % B 
Hydrogen 0.12 % H 
Carbon 3.65 % C 
Oxygen 48.65 % O 
 Empirical Formula:
Ca24Mg8Al2(SiO4)8(BO3)6(CO3)10·2(H2O)
Physical Properties:
 Cleavage:
None
 Color:
colorless.
 Density:
2.959
 Diaphaniety:
Transparent
 Luminescence:
Fluorescent.
 Luster:
Vitreous (Glassy)
 Streak:
white
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