Braunite with Calcite

N'Chwaning III Mine, N'Chwaning mining area, Kuruman, Kalahari manganese field (KMF), Northern Cape Province  South Africa (2008)

Specimen size: 6.6 × 6 × 3.9 cm = 2.60” × 2.36” × 1.54”
Main crystal size: 0.3 × 0.3 cm = 0.12” × 0.12”