Falcondoite

General Information:
 Chemical Formula:
(Ni,Mg)4Si6O15(OH)2·6(H2O)
 Composition:
(Molecular Weight = 750.99 gm)
Magnesium 3.24 % Mg
Silicon 22.44 % Si
Nickel 23.45 % Ni
Hydrogen 1.88 % H 
Oxygen 49.00 % O 
 Empirical Formula:
Ni3MgSi6O15(OH)2·6(H2O)
 IMA Status:
Approved IMA 1976
Physical Properties:
 Color:
green or yellowish green.
 Density:
2.41
 Diaphaniety:
Translucent to Subopaque
 Habits:
Stalactitic - Shaped like pendant columns as stalactites or stalagmites (e.g. calcite)., ,
 Hardness:
3-4 - Calcite-Fluorite
 Luminescence:
Non-fluorescent.
 Luster:
Resinous
 Streak:
white
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