Rare connoisseur specimen from unique find in Tantara Mine, Congo Kinshasa of Shattuckite pseudomorph after Dioptase, after Calcite. The secondary Copper silicate Shattuckite replaces Dioptase crystals replacing the first generation of Calcite crystals. The Shattuckite has an intense and saturated dark blue color. Some light blue Chrysocolla is seen too. Some natural imperfections.

Choice double pseudomorph!