Pyrite with Sphalerite and Calcite

Huanzala Mine, Huallanca District, Dos de Mayo Province, Huánuco Department  Peru

Specimen size: 7 × 5.8 × 4.8 cm = 2.76” × 2.28” × 1.89”
Main crystal size: 1.5 × 1.4 cm = 0.59” × 0.55”