mineral

Rhodochrosite

Manganese carbonate (MnCO3)

AI-generated identification · may be incorrect

Mohs hardness 3.5 - 4; characteristic rose-red to raspberry pink with alternating white to pale pink concentric or zigzag banding; vitreous to pearly luster; trigonal crystal system; rhombohedral cleavage; specific gravity approximately 3.5 - 3.7

Identified October 3, 2026More mineral →

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Physical properties

Formation & geological history

Forms primarily in hydrothermal veins associated with silver, lead, and copper deposits at moderate to low temperatures, or as secondary stalactitic/sedimentary deposits precipitated in cavities and ancient mine workings (such as the Capillitas deposits in Argentina).

Uses & applications

Popular gemstone for cabochons, beads, and carved ornamental objects like eggs, spheres, and figurines; historically used as a minor manganese ore; prized specimen mineral for collectors.

Geological facts

Known affectionately as 'Inca Rose' because the Incas believed it was the petrified blood of their ancestral kings; it is the national gemstone of Argentina and the state mineral of Colorado, USA.

Field identification & locations

Easily recognized by its distinct pink color, soft Mohs hardness (can be scratched by a copper coin or knife), and distinctive concentric/wavy banding; effervesces in warm dilute hydrochloric acid. Most famous banded deposits are found in the Capillitas mine in Catamarca, Argentina.