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(n.)
A hydrous carbonate of magnesia occurring in white, early, amorphous masses.
  

General Information:
 Chemical Formula:
Mg5(CO3)4(OH)2·4(H2O)
 Composition:
(Molecular Weight = 467.64 gm)
Magnesium 25.99 % Mg
Hydrogen 2.16 % H 
Carbon 10.27 % C 
Oxygen 61.58 % O 
 Empirical Formula:
Mg5(CO3)4(OH)2·4(H2O)
 Name Origin:
Named after its chemical composition.
Physical Properties:
 Cleavage:
[010] Perfect, [100] Distinct
 Color:
colorless or white.
 Density:
2.16 - 2.2, Average = 2.18
 Diaphaniety:
Transparent
 Habits:
Acicular - Occurs as needle-like crystals., Encrustations - Forms crust-like aggregates on matrix.,
 Hardness:
3.5 - Copper Penny
 Luminescence:
Fluorescent, Short UV=green, Long UV=bluish white.
 Luster:
Silky
 Streak:
white
More details...

See more at Wikipedia.org...

(n.)
A hydrous carbonate of magnesia occurring in white, early, amorphous masses.
  

General Information:
 Chemical Formula:
Mg5(CO3)4(OH)2·4(H2O)
 Composition:
(Molecular Weight = 467.64 gm)
Magnesium 25.99 % Mg
Hydrogen 2.16 % H 
Carbon 10.27 % C 
Oxygen 61.58 % O 
 Empirical Formula:
Mg5(CO3)4(OH)2·4(H2O)
 Name Origin:
Named after its chemical composition.
Physical Properties:
 Cleavage:
[010] Perfect, [100] Distinct
 Color:
colorless or white.
 Density:
2.16 - 2.2, Average = 2.18
 Diaphaniety:
Transparent
 Habits:
Acicular - Occurs as needle-like crystals., Encrustations - Forms crust-like aggregates on matrix.,
 Hardness:
3.5 - Copper Penny
 Luminescence:
Fluorescent, Short UV=green, Long UV=bluish white.
 Luster:
Silky
 Streak:
white
More details...