mineral

Rhodonite

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

Hardness: 5.5-6.5; Color: Rose-pink to brownish-red with black manganese oxide veins; Luster: Vitreous to pearly; Crystal structure: Triclinic; Cleavage: Perfect; Specific gravity: 3.5-3.7

Hardness: 5
Color: Rose-pink to brownish-red with black manganese oxide veins
Luster: Vitreous to pearly

Identified June 18, 2026More mineral →

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Physical properties

Hardness: 5.5-6.5; Color: Rose-pink to brownish-red with black manganese oxide veins; Luster: Vitreous to pearly; Crystal structure: Triclinic; Cleavage: Perfect; Specific gravity: 3.5-3.7

Formation & geological history

Formed in metamorphic rocks often associated with manganese ores and hydrothermal activities. It can also occur in contact metasomatic rocks. Most high-quality specimens date back to the Paleozoic or Mesozoic eras depending on the local geology.

Uses & applications

Primarily used as a gemstone for jewelry (cabochons, beads), decorative carvings, and as a minor ore of manganese. It is highly valued by crystal collectors for its distinctive pink and black pattern.

Geological facts

Rhodonite derives its name from the Greek word 'rhodon', meaning rose-colored. It is the official state gem of Massachusetts. Unlike rhodochrosite, rhodonite is silicate-based, making it harder and more durable for jewelry.

Field identification & locations

Identify by its characteristic pink color with black dendritic (tree-like) inclusions of manganese oxide. It is commonly found in Russia, Sweden, Australia, Canada, and the USA (New Jersey, Massachusetts). It does not react with acid like similar-looking pink carbonates.