This calcite is 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. The calcite is a common gangue mineral associated with the sphalerite. This specimen is a translucent to transparent double terminated calcite crystal. The crystal is twinned. The tips have slightly cleaved and healed surfaces which is typical for the calcites from this locale There are inclusions of chalcopyrite crystals and the rear has some remnant barite and sphalerite matrix This piece measures approximately 2 5/8 x 2 1/16 x 1 1/4 inches or 67 x 51 x 32 mm.