EJ89AG8: The great mining region of Trepča is one of the largest polymetal deposits in the world and it has given for many years exceptional pieces of Sphalerite as well as varied combinations of sulfides and carbonates. This old piece, found before the mine went back to work in 2005, presents an architectural group of large rhombohedral Dolomite crystals partially coated by Calcite crystals and with a cluster of Pyrite crystals on one side of the piece. Small crystals of Arsenopyrite dot the large Dolomite crystals and also some small Quartz crystals complete the combo.
Stan Trg (Stan Terg, Stari Trg) Mine, Trepča Complex, Trepča Valley, Kosovska Mitrovica, Kosovska Mitrovica District  Kosovo (1994-2002)

Specimen size: 18.5 × 11.5 × 7.7 cm = 7.28” × 4.53” × 3.03”

Main crystal size: 4 × 3.3 cm = 1.57” × 1.30”