This calcite crystal is from the Elmwood Mine in Carthage, Smith County, Tennessee, USA. 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 gangue species like calcite. It is a carbonate mineral containing the elements Ca, C and O. This specimen consists of a translucent to transparent crystal whose translucency is accented by being lighted from the rear as displayed in photos 2-4. The crystal has a glass luster and a pristine termination. The base is cleaved and the rear contains some original sphalerite matrix. This piece measures 2 3/4 x 1 3/4 x 1 inches or 67 x 45 x 25 mm.