Bixbyite with Sturmanite and Calcite

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

Specimen size: 4.4 × 3.8 × 2.7 cm = 1.73” × 1.50” × 1.06”
Main crystal size: 0.4 × 0.2 cm = 0.16” × 0.08”