Pyrite after Pyrrhotite and with Sphalerite

Stan Trg (Stan Terg, Stari Trg) Mine, Trepča Complex, Trepča Valley, Kosovska Mitrovica, Kosovska Mitrovica District  Kosovo (2012)

Specimen size: 8.6 × 5.6 × 3.7 cm = 3.39” × 2.20” × 1.46”
Main crystal size: 0.9 × 0.7 cm = 0.35” × 0.28”