Measurements: 43 x 33 x 28
mm
Description: Aggregates of olmiite crystals with bits of calcite.
The specimen has a number of
contact marks. Please note that the colour of olmiite is difficult to portray accurately, due to the electric lighting.
Weight
of Specimen: 44.2 g
Chemical Composition: CaMn[SiO3(OH)](OH) (olmiite)
CaCO3 (calcite)
Hardness
on Mohs Scale: (olmiite) 5-5.5
(calcite)
3
Location: N'Chwaning 2 mine, Kalahari Manganese Fields, Kuruman area, Northern Cape, South Africa.
Specimen Code: SKMF
012
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