Dioptase

Tantara Mine, Shinkolobwe, Katanga Copper Crescent, Katanga (Shaba)  Congo D.R.

Specimen size: 7.3 × 7.2 × 2.7 cm = 2.87” × 2.83” × 1.06”
Main crystal size: 1 × 1 cm = 0.39” × 0.39”