Octahedral Pyrite

Shumin Mine, Usquil, Usquil District, Otuzco Province, La Libertad Department  Peru (2010)

Specimen size: 2.5 × 2.1 × 2.3 cm = 0.98” × 0.83” × 0.91”
Main crystal size: 1.6 × 1.2 cm = 0.63” × 0.47”