Rhodonite

Physical Properties

Hardness: 5.5-6.5 Mohs; Color: Rose pink with black manganese oxide inclusions; Luster: Vitreous to pearly; Crystal Structure: Triclinic; Cleavage: Perfect; Specific Gravity: 3.5-3.7

Formation & Geological History

Formed in manganese-rich metamorphic rocks or hydrothermal veins. It results from the regional metamorphism of manganese carbonates like rhodochrosite in contact with silica.

Uses & Applications

Polished for use in jewelry (cabochons), ornamental carvings, decorative spheres, and as a minor ore of manganese.

Geological Facts

The name comes from the Greek word 'rhodon', meaning rose. It was once believed to help travelers protect themselves against thieves. It is the state gemstone of Massachusetts.

Field Identification & Locations

Identify by its distinctive rose-pink color with black dendritic or vein-like inclusions of manganese oxide. Found in Russia (Ural Mountains), Australia, Brazil, and the USA. Collectors look for high contrast between pink and black.

Identified on: 4/28/2026

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