This calcite on sphalerite is from the Cumberland Mine in Smith County, Tennessee, USA. This mine is located next to the Elmwood mine which are both mined primarily for zinc ore. It contains 6 different minerals including sphalerite, a sulfide of zinc and gangue minerals like calcite which is a carbonate. This specimen consists of a thin plate of glistening sphalerite crystals that hosts clusters of scalenahedral calcite crystals. The calcites are translucent to transparent and have the orange-amber color that this mine is renowned for. This piece measures 1 x 1 x 3/4 inches or 25 x 25 x 19 mm.