Barringtonite

General Information:
 Chemical Formula:
MgCO3·2(H2O)
 Composition:
(Molecular Weight = 120.34 gm)
Magnesium 20.20 % Mg
Hydrogen 3.35 % H 
Carbon 9.98 % C 
Oxygen 66.47 % O 
 Empirical Formula:
Mg(CO3)·2(H2O)
 Environment:
Found with nesquehonite on the surfaces of olivine basalt.
 IMA Status:
Approved IMA 1965
 Locality:
Barrington Tops, NSW, Australia.
 Name Origin:
After its locality.
Physical Properties:
 Cleavage:
[001] Distinct, [100] Distinct, [010] Distinct
 Color:
colorless.
 Density:
2.83
 Diaphaniety:
Transparent
 Habits:
Nodular - Tuberose forms having irregular protuberances over the surface., Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite), Fibrous - Crystals made up of fibers.
 Streak:
white
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