These sphalerite crystals are from the Elmwood Mine in Carthage, Smith County, Tennessee, Ba-F-Pb-Zn District, 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. This is a cluster of complex crystals that are well defined and have a mirror luster. This piece is a small miniature that measures approximately 1 1/8 x 1 1/8 x 5/8 inches or 28 x 28 x 16 mm.