Dioptase

'Mbumba, Pimbi Hill, Mindouli, Mindouli District, Pool Department  Congo D.R.

Specimen size: 4.9 × 4.3 × 3.3 cm = 1.93” × 1.69” × 1.30”
Main crystal size: 2.8 × 1.4 cm = 1.10” × 0.55”