Dī-ŏp'tāse, n.
n. [Gr. δι, for διά, through, and διοπτάζειν, to see; Fr. dioptase.] (Min.) An ore of copper, consisting of silica and copper, with twelve per cent. water. It occurs in rich, emerald-green crystals.
n. [Gr. δι, for διά, through, and διοπτάζειν, to see; Fr. dioptase.] (Min.) An ore of copper, consisting of silica and copper, with twelve per cent. water. It occurs in rich, emerald-green crystals.