mineral

Rhodonite

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

Hardness: 5.5-6.5 on Mohs scale; Color: Pink to rosy red with black dendritic inclusions; Luster: Vitreous to pearly; Crystal structure: Triclinic; Cleavage: Perfect; Specific gravity: 3.5-3.7

Hardness: 5
Color: Pink to rosy red with black dendritic inclusions
Luster: Vitreous to pearly

Identified May 9, 2026More mineral →

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Physical properties

Hardness: 5.5-6.5 on Mohs scale; Color: Pink to rosy red with black dendritic inclusions; Luster: Vitreous to pearly; Crystal structure: Triclinic; Cleavage: Perfect; Specific gravity: 3.5-3.7

Formation & geological history

Forms in hydrothermal metamorphic environments and contact metamorphic rocks rich in manganese minerals. It is often found as compact masses or grains rather than distinct crystals.

Uses & applications

Primarily used as a gemstone for jewelry, cabochons, and ornamental carvings. Historically used as a minor ore of manganese.

Geological facts

The name is derived from the Greek word 'rhodon', meaning rose. It was once used in Russia as a protective stone for babies and travelers, and it is the state gemstone of Massachusetts, USA.

Field identification & locations

Identify by its characteristic 'pink and black' appearance; the black markings are manganese oxides. Found in Russia (Urals), Australia, Brazil, and the USA. It is harder than Rhodochrosite and lacks the white banding usually seen in that mineral.