Natural mineral specimen featuring calcite crystals formed on a base of black chalcedony. Chalcedony is a microcrystalline variety of quartz that develops in volcanic and sedimentary environments, while calcite (calcium carbonate) often crystallizes later from mineral-rich fluids. The light calcite against the dark chalcedony creates a striking visual contrast.
A beautiful display piece for shelves, showcases, or mineral collections. Each specimen is naturally formed, with unique crystal shapes, textures, and color variations.
