Calcite and Oyelite on Matrix - SKMF 004

Measurements:  55 x 53 x 32 mm

Description:  Sparkling, gemmy calcite crystals with aggregates of oyelite, on matrix.

The specimen has relatively little damage, only a few contact marks.

Weight of Specimen:  88.3 g

Chemical Composition:  CaCO₃   (calcite)  
                                      Ca₁₀B₂Si₈O₂₉•12(H₂O)  (oyelite)    

Hardness on Mohs Scale:  (calcite)  3
                                          (oyelite)  5

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

Specimen Code:  SKMF 004

US $ 150