A fascinating specimen of dioptase crystals from Reneville, Kindanba District, Pool Department, Congo - Brazzaville. It comes from the renowned collection of Gilles Emringer, France with a label. The crystals are strongly lustrous with a rich dark emerald-green color and very sharp, perfectly doubly terminated crystals. The quality is superb - the crystals are well isolated and they contrast strongly on the white base. Some nicks and contacts.

Excellent!