mineral

Rhodonite

Manganese Silicate (Mn,Fe,Mg,Ca)SiO3

Hardness: 5.5-6.5 on Mohs scale; Color: Pink to rosy red with black manganese oxide veins; Luster: Vitreous to pearly; Crystal Structure: Triclinic; Specific Gravity: 3.5-3.7

Hardness: 5
Color: Pink to rosy red with black manganese oxide veins
Luster: Vitreous to pearly

Identified May 27, 2026More mineral →

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Physical properties

Hardness: 5.5-6.5 on Mohs scale; Color: Pink to rosy red with black manganese oxide veins; Luster: Vitreous to pearly; Crystal Structure: Triclinic; Specific Gravity: 3.5-3.7

Formation & geological history

Formed in metamorphic rocks rich in manganese through hydrothermal processes or metasomatism. Often found in ore deposits and gneiss.

Uses & applications

Commonly used for ornamental carvings, jewelry (cabochons and beads), and as a manganese ore. Valued by collectors for its distinct pink and black contrast.

Geological facts

The name comes from the Greek word 'rhodon', meaning rose-colored. It is the state gemstone of Massachusetts, USA. Significant deposits exist in Russia, Australia, and Brazil.

Field identification & locations

Identify by its characteristic 'patchy' appearance of pink mixed with dendritic black manganese oxides. It is heavier than similar-looking rhodochrosite and lacks the latter's reactive fizzing to acid.