Sphalerite with Calcite

Elmwood Mine, Carthage, Central Tennessee Ba-F-Pb-Zn District, Smith County, Tennessee  USA

Specimen size: 7.9 × 7.4 × 4.4 cm = 3.1” × 2.9” × 1.7”
Main crystal size: 0.9 × 0.8 cm = 0.4” × 0.3”