These sphalerite crystals on are from the Elmwood Mine in Carthage, Smith County, Tennessee, Ba-F-Pb-Zn District, Tennessee, US. This mine contains three shafts called the Elmwood, Cumberland, and Gordonsville. It has an entry slope called the Stonewall. They contain eleven different minerals including sphalerite which is the main ore mineral. Sphalerite is a sulfide and it contains the elements Zn and S. This is a 360 degree ball-like cluster of complex sphalerites a top a small chert matrix. It can be viewed from all sides. There are some small calcite crystals scattered about the piece. This piece measures 2 3/8 x 1 7/8 x 1 7/8 inches or 60 x 47 x 47 mm.