Nchwaningite

General Information:
 Chemical Formula:
Mn++2SiO3·(H2O)
 Composition:
(Molecular Weight = 203.98 gm)
Manganese 53.87 % Mn
Silicon 13.77 % Si
Hydrogen 0.99 % H 
Oxygen 31.38 % O 
 Empirical Formula:
Mn2+2SiO3·(H2O)
 Environment:
In a vug in manganese ore.
 IMA Status:
Approved IMA
 Locality:
The N,chwaning II Mine, Kalahari Manganese Field, Northern Cape Province, Republic of South Africa.
 Name Origin:
Named for its locality.
Physical Properties:
 Cleavage:
[100] Perfect, [010] Perfect
 Color:
light brown.
 Density:
3.19
 Diaphaniety:
Transparent
 Habits:
Spherical - Spherical, rounded aggregates., Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite), Acicular - Occurs as needle-like crystals.
 Hardness:
5.5 - Knife Blade
 Luminescence:
Non-fluorescent.
 Luster:
Vitreous (Glassy)
 Streak:
white
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