Sphalerite on Quartz

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

Specimen size: 2.2 × 1.8 × 1.4 cm = 0.87” × 0.71” × 0.55”
Main crystal size: 1.7 × 1.6 cm = 0.67” × 0.63”