A nice specimen formed by some dioptase crystals showing their characteristic emerald green color. Dioptase crystals show predominant trigonal prism sharp faces with rhombohedral terminal faces, with interpenetrated growth. Excellent brilliance and some transparence. On a matrix covered by botryoidal sky blue chrysocolla aggregates. THE MAIN CRYSTAL IS: 0,8 x 0,3 x 0,3 cm.