Pyrite after Pyrrhotite with Sphalerite, Calcite and Boulangerite

Stan Trg (Stan Terg, Stari Trg) Mine, Trepča Complex, Trepča Valley, Kosovska Mitrovica, Kosovska Mitrovica District  Kosovo (05/2021)

Specimen size: 13.3 × 4.6 × 2.8 cm = 5.24” × 1.81” × 1.10”
Main crystal size: 2.3 × 2.2 cm = 0.91” × 0.87”