Sphalerite with Chalcopyrite and Calcite with Boulangerite, Trepca Complex near Mitrovica, Kosovska Municipality, Kosovo, Mined 2015, Small Cabinet 2.5 x 6.5 x 8.0 cm, $75. Online 5/29/15. SOLD.
Epitaxic chalcopyrite on sphalerite is classic from a multitude of ore bodies across the world. I have always liked the association and it's endless variations. This piece is from new mining in 2015 and shows the characteristic preferential over-growths typical of the process. Matrix is deep gray boulangerite-included calcite with associated sphalerite. In great condition.