Rhodochrosite with manganese oxides

Uchucchacua Mine, Oyón Province, Lima Department  Peru (2006)

Specimen size: 7.4 × 4.9 × 4.1 cm = 2.91” × 1.93” × 1.61”
Main crystal size: 2.5 × 1.1 cm = 0.98” × 0.43”