Dioptase

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

Specimen size: 4.9 × 4 × 3.2 cm = 1.93” × 1.57” × 1.26”
Main crystal size: 2.8 × 1.7 cm = 1.10” × 0.67”