Olmiite

N'Chwaning II Mine, section 5 south, stope 46-47 roof, N'Chwaning mining area, Kuruman, Kalahari manganese field (KMF), Northern Cape Province  South Africa (01/2002)

Specimen size: 4.8 × 2 × 3.4 cm = 1.89” × 0.79” × 1.34”