Calcite with Dolomite and Chalcopyrite

Sweetwater Mine, Ellington, Viburnum Trend District, Reynolds County, Missouri  USA

Specimen size: 11.8 × 10.3 × 9.3 cm = 4.65” × 4.06” × 3.66”
Main crystal size: 9 × 2.8 cm = 3.54” × 1.10”