Mineral

Rhodonite

Rhodonite (Manganese Iron Magnesium Calcium Silicate) - (Mn,Fe,Mg,Ca)SiO3

Hardness: 5.5 to 6.5 Mohs scale; Color: Pink to rose-red with black manganese oxide inclusions (dendritic veins); Luster: Vitreous to pearly; Crystal Structure: Triclinic; Cleavage: Perfect in two directions; Specific Gravity: 3.5 to 3.7

Hardness: 5
Luster: Vitreous to pearly

Identified March 28, 2026More mineral →

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Physical properties

Formation & geological history

Formed in manganese-rich metamorphic rocks, hydrothermal ores, or contact metamorphic deposits. It is often found associated with manganese oxides and other silicate minerals. Most deposits date back to various Precambrian or Paleozoic geological eras depending on location.

Uses & applications

Commonly used as a gemstone for cabochons, beads, and carvings. Also used as an ornamental stone in jewelry, architecture, and interior design. Historically, it was used as an ore of manganese in minor capacities.

Geological facts

The name is derived from the Greek word 'rhodon', meaning 'rose'. It is the state gemstone of Massachusetts, USA. Unlike Rhodochrosite, which is a carbonate and reacts to acid, Rhodonite is a silicate and does not. The black veins are caused by the oxidation of manganese.

Field identification & locations

Identify in the field by its distinct rose-pink color contrasted against black manganese veins and its relatively high hardness. Common locations include Russia (Urals), Australia, Brazil, Sweden, and the USA (New Jersey, Massachusetts). For collectors, the presence of 'pink and black' patterns is the primary diagnostic feature.

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