Pyrite with Dolomite and Sphalerite

Atalaya Mine, Huallanca District, Bolognesi Province, Ancash Department  Peru (11/2015)

Specimen size: 11.5 × 8 × 5.8 cm = 4.53” × 3.15” × 2.28”
Main crystal size: 5 × 4.7 cm = 1.97” × 1.85”