Superb! Big DIOPTASE Crystal with CALCITE on MATRIX from Mindouli Dr. CONGO Specimen - Height: 6.5 cm - Width: 4.5 cm- 93 g

Dioptase is an intense emerald-green to bluish-green copper cyclosilicate mineral prized for its vibrant color and brilliance. It often forms well-defined, translucent crystals that are increasingly popular among mineral collectors. This specimen features a superb large dioptase crystal accompanied by calcite on matrix, sourced from Mindouli in the Republic of Congo, a region known for producing fine mineral samples. Calcite is a common calcium carbonate mineral with diverse crystal forms and can appear translucent to opaque with various colors, frequently associated with copper minerals like dioptase. The combination of these two minerals on a natural rock matrix highlights the geological environment in which they formed, often hydrothermal veins or oxidized zones of copper deposits. Collectors cherish specimens like this for their aesthetic contrast, bright colors, and crystal quality. Measuring 6.5 cm in height and 4.5 cm in width, this piece showcases the bold coloration and well-preserved crystal habits typical of Congolese dioptase.