mineral

Rhodonite

Rhodonite (Manganese Iron Magnesium Calcium Silicate) - (Mn+2,Fe+2,Mg,Ca)SiO3

Hardness: 5.5-6.5 Mohs; Color: Pink to rose-red with black patches/veins; Luster: Vitreous to pearly; Crystal structure: Triclinic; Cleavage: Perfect; Specific Gravity: 3.5-3.7

Hardness: 5
Color: Pink to rose-red with black patches/veins
Luster: Vitreous to pearly

Identified March 25, 2026More mineral →

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Physical properties

Hardness: 5.5-6.5 Mohs; Color: Pink to rose-red with black patches/veins; Luster: Vitreous to pearly; Crystal structure: Triclinic; Cleavage: Perfect; Specific Gravity: 3.5-3.7

Formation & geological history

Formed through regional metamorphism of manganese-rich rocks or via hydrothermal replacement. It is often found in contact metamorphic deposits and manganese ores.

Uses & applications

Primarily used as an ornamental stone, for lapidary work (cabochons, beads), small carvings, and as a minor ore of manganese.

Geological facts

The name comes from the Greek word 'rhodon', meaning 'rose'. It is the official state gemstone of Massachusetts, USA. The black veining is caused by oxidation of the manganese into manganese oxides.

Field identification & locations

Identify in the field by its distinct pink color combined with dendritic or spiderweb-like black manganese oxide inclusions. Common locations include Russia (Urals), Australia, Brazil, and the USA (New Jersey).

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