Rhodonite

Physical Properties

Hardness: 5.5-6.5 on Mohs scale; Color: Pink to rosy red with occasional black or gray inclusions; Luster: Vitreous to pearly; Crystal structure: Triclinic; Cleavage: Perfect; Specific gravity: 3.5-3.7

Formation & Geological History

Forms through metamorphic or metasomatic processes involving manganese-rich sediments or ores. It is often found in contact metamorphic rocks and hydrothermal deposits.

Uses & Applications

Used primarily as an ornamental stone, for carvings, jewelry (cabochons and beads), and as a minor ore of manganese. It is highly valued by collectors for its distinct pink hue.

Geological Facts

Named from the Greek word 'rhodon', meaning 'rose'. It is the state gemstone of Massachusetts, USA. Unlike Rhodochrosite, Rhodonite is a silicate and much harder.

Field Identification & Locations

Identify in the field by its pink color, high density, and lack of reaction to acid. It often presents with black manganese oxide veins (dendrites), though this polished specimen is relatively clean. Found in Russia, Sweden, Australia, Canada, and the USA.

Identified on: 5/10/2026

Mode: Standard