Olmiite Ball on Manganite - SKMF 020

Measurements:  37 x 32 x 14 mm

Description:   A neat ball of olmiite (20 mm in diametre) sits on manganite rock.

The olmiite has no notable damage.                             

Weight of Specimen:  25.1 g

Chemical Composition:  CaMn[SiO₃(OH)](OH)  (olmiite)
                                    Mn³⁺O(OH) (manganite) 

Hardness on Mohs Scale:  (olmiite)  5-5.5
                                         (manganite) 4 

Location:  N'Chwaning 2 mine, Kalahari Manganese Fields, Kuruman area, South Africa.

Specimen Code:  SKMF 020

US $ 35