- Small Cabinet, 5.5 x 4.2 x 4.2 cm
- N'Chwaning Mines, Kuruman, Kalahari manganese fields, Northern Cape Province, South Africa
This is a HUGE ball of poldervaartite, truly remarkable considering that this is a rare mineral found only in the Kalahari Manganese mines, and not even identified until 1993. The sparkly dome measures over 4 cm across! It is extremely unusual to find a single cluster this large.