Dioptase - Mineral Specimen calcium sodium feldspar Gypsum minerals form when sulfate-rich

Gypsum minerals form when sulfate-rich water evaporates in sedimentary basins

while the actinolite forms as an amphibole mineral under metamorphic conditions

and white create a mist-like pattern unique to each piece

also known as Brown Calcite

The firm bond helps keep stones stable while working on faceting machines

Dioptase - Mineral Specimen calcium sodium feldspar Gypsum minerals form when sulfate-richMined from: Renville Mine, Pool Department, Republic of the Congo Description: This dioptase specimen shows a tight cluster of deep teal green crystals growing out of a pale, weathered matrix. The crystals are more elongated and blade like than typical blocky forms, with sharp terminations and a strong vitreous luster. The color leans toward a darker, almost inky green, especially in the thicker crystals, while thinner edges show more transparency.