Olmiite on Calcite - SKMF 052

Measurements:  22 x 19 x 15 mm

Description:  Aggregates of olmiite crystals sit on calcite crystals. 

The specimen has a few contact and pressure marks.

Weight of Specimen:  6.6 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, South Africa.

Specimen Code:  SKMF 052

US $ 18