Rhodochrosite with manganese oxides

Uchucchacua Mine, Oyón Province, Lima Department  Peru (±2000)

Specimen size: 7.4 × 6 × 5.7 cm = 2.91” × 2.36” × 2.24”
Main crystal size: 1.6 × 0.9 cm = 0.63” × 0.35”