An extraordinary, highly aesthetic masterpiece specimen featuring gem-quality Dioptase crystals from the famous N'tola Mine in the Mindouli District, Republic of the Congo (Brazzaville). The piece displays sharp, intensely saturated, emerald-green prismatic dioptase crystals with a brilliant vitreous luster, perfectly perched on a contrasting matrix coated with vibrant blue shattuckite/plancheite aggregates. The color contrast between the deep emerald green and the sky-blue matrix is breathtaking. With flawless crystal terminations and a well-balanced miniature format, this is a top-tier collector's specimen from a classic West-Central African copper deposit.