Mineral

Rhodonite

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

AI-generated identification · may be incorrect

Hardness: 5.5-6.5 on Mohs scale; Color: Pink to rose-red with black dendritic manganese oxide inclusions; Luster: Vitreous to pearly; Crystal Structure: Triclinic; Cleavage: Perfect in two directions; Specific Gravity: 3.4-3.7

Hardness: 5
Luster: Vitreous to pearly

Identified March 26, 2026More mineral →

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Physical properties

Formation & geological history

Usually forms in metamorphic rocks through the metamorphism of manganese-rich sedimentary rocks or as a primary mineral in hydrothermal veins. It is found in deposits ranging from Precambrian to more recent geological eras.

Uses & applications

Used primarily as an ornamental stone, for lapidary work (cabochons, beads), decorative carvings, and occasionally as a minor ore of manganese. It is a popular collector's mineral.

Geological facts

The name comes from the Greek word 'rhodon', meaning rose. It was designated as the state gemstone of Massachusetts in 1979. It is often confused with Rhodochrosite, but can be distinguished by its black manganese oxide patterns and higher hardness.

Field identification & locations

Identify in the field by its distinct pink color paired with black branching (dendritic) veins. Common locations include Russia (Ural Mountains), Australia, Sweden, Brazil, and the USA (New Jersey and Massachusetts).