mineral

Rhodochrosite

Manganese Carbonate (MnCO3)

Hardness: 3.5-4 (Mohs); Color: Pink to rose-red, sometimes brownish; Luster: Vitreous to pearly; Crystal structure: Trigonal; Cleavage: Perfect rhombohedral; Specific gravity: 3.5-3.7

Hardness: 3
Color: Pink to rose-red, sometimes brownish
Luster: Vitreous to pearly

Identified March 23, 2026More mineral →

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Physical properties

Hardness: 3.5-4 (Mohs); Color: Pink to rose-red, sometimes brownish; Luster: Vitreous to pearly; Crystal structure: Trigonal; Cleavage: Perfect rhombohedral; Specific gravity: 3.5-3.7

Formation & geological history

Formed in hydrothermal veins of low to moderate temperature, often associated with silver, lead, and copper deposits. It can also form as a secondary mineral in carbonate sediment.

Uses & applications

Primarily used as a semi-precious gemstone for jewelry (beads, cabochons) and as a minor ore of manganese. Highly prized by mineral collectors for its vivid pink color.

Geological facts

Known as the 'Inca Rose' because the Incas believed it was the solidified blood of their ancestral kings. It is the official state mineral of Colorado, USA.

Field identification & locations

Identify by its distinct pink color, white streak, and reaction to warm hydrochloric acid (effervescence). Often shows characteristic banding or concentric patterns. Common locations include Argentina, Peru, South Africa, and the USA (Sweet Home Mine).