Calcite (variety Co-bearing calcite)

Katanga Copper Crescent, Katanga (Shaba)  Congo D.R.

Specimen size: 5.7 × 4.2 × 4.4 cm = 2.24” × 1.65” × 1.73”
Main crystal size: 0.5 × 0.4 cm = 0.20” × 0.16”