Sphalerite with Galena and Chalcopyrite

Commodore Mine, Creede District, Mineral County, Colorado  USA

Specimen size: 8.4 × 6.4 × 2.8 cm = 3.31” × 2.52” × 1.10”
Main crystal size: 1.2 × 1 cm = 0.47” × 0.39”