mineral

Rhodonite

Rhodonite (Manganese silicate), (Mn,Fe,Mg,Ca)SiO3

AI-generated identification · may be incorrect

Hardness: 5.5-6.5 on Mohs scale; Color: Rose-pink to brownish-red with black manganese oxide inclusions; Luster: Vitreous to pearly; Crystal structure: Triclinic; Specific gravity: 3.5-3.7.

Hardness: 5
Luster: Vitreous to pearly

Identified March 24, 2026More mineral →

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Physical properties

Hardness: 5.5-6.5 on Mohs scale; Color: Rose-pink to brownish-red with black manganese oxide inclusions; Luster: Vitreous to pearly; Crystal structure: Triclinic; Specific gravity: 3.5-3.7.

Formation & geological history

Usually found in metamorphic rocks associated with manganese ores, formed through contact metamorphism or hydrothermal processes. Major deposits are found in Russia, Australia, Brazil, and the USA.

Uses & applications

Primarily used as an ornamental stone, for lapidary work, cabochons for jewelry, and occasionally as a minor ore of manganese. High-quality transparent crystals are faceted for collectors.

Geological facts

The name is derived from the Greek word 'rhodon', meaning rose. It was once used in Russia to make tiles for the Moscow Metro and is currently the state gemstone of Massachusetts.

Field identification & locations

Identify by its distinct 'bubblegum pink' base color contrasted by black dendritic (tree-like) or veined patterns of manganese oxide. It is harder than rhodochrosite and does not react to acid.