mineral

Rhodochrosite

Manganese Carbonate (MnCO3)

Hardness: 3.5-4.0 (Mohs scale), Color: Pink to rose-red with white banding, Luster: Vitreous to pearly, Crystal structure: Trigonal, Cleavage: Perfect rhombohedral, Specific Gravity: 3.5-3.7

Hardness: 3

Identified June 25, 2026More mineral →

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Physical properties

Hardness: 3.5-4.0 (Mohs scale), Color: Pink to rose-red with white banding, Luster: Vitreous to pearly, Crystal structure: Trigonal, Cleavage: Perfect rhombohedral, Specific Gravity: 3.5-3.7

Formation & geological history

Commonly forms in hydrothermal veins associated with silver, copper, and lead deposits. It also forms as stalactitic masses in caves and sedimentary environments through the oxidation of manganese minerals.

Uses & applications

Primarily used as a gemstone for jewelry (beads, cabochons), a collector's mineral, and an ore of manganese. It is popular in metaphysical circles as the 'Stone of the Compassionate Heart'.

Geological facts

The Capillitas mine in Argentina is famous for its unique stalactitic rhodochrosite. It is the national gemstone of Argentina and the state mineral of Colorado, where the famous Sweet Home Mine produces cherry-red crystals.

Field identification & locations

Identify by its characteristic pink color and white zigzag or lace-like banding. It will effervesce (fizz) in warm hydrochloric acid. Found in Argentina, Peru, South Africa, and the USA.