mineral

Rhodonite

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

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

Hardness: 5
Color: Pink to rose-red with black manganese oxide veining
Luster: Vitreous to pearly

Identified March 16, 2026More mineral →

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Physical properties

Formation & geological history

Formed through regional metamorphism or hydrothermal processes in manganese-rich environments. Common in metamorphic rocks and hydrothermal ore deposits. It can occur in deposits spanning various geological ages from Precambrian to more recent formations.

Uses & applications

Used primarily as an ornamental stone, for lapidary work (cabochons, beads), small sculptures, and occasionally as a manganese ore in industrial applications.

Geological facts

The name comes from the Greek word 'rhodon', meaning rosy. It is the state gem of Massachusetts. Unlike Rhodochrosite, which is a carbonate, Rhodonite is a silicate and significantly harder.

Field identification & locations

Identify by its distinct 'candy-pink' color paired with black dendritic (tree-like) or veined manganese oxide inclusions. Found commonly in Brazil, Russia (Urals), Australia, and the USA (New Jersey and Colorado). Collectors look for bright pink color with minimal bruising.