Rhodonite

Physical Properties

Hardness: 5.5-6.5 on Mohs scale; Color: Pink, rose-red, or brownish-red, often with black dendritic veins of manganese oxide; Luster: Vitreous to pearly; Crystal structure: Triclinic; Specific gravity: 3.5 - 3.7.

Formation & Geological History

Formed through metamorphic processes and hydrothermal activity. It occurs in manganese-rich metamorphic rocks, often associated with metasomatism. Most deposits are from the Precambrian to Cenozoic eras.

Uses & Applications

Used primarily as an ornamental stone, in gemstone jewelry (cabochons and beads), and as a minor ore of manganese. It is also popular among mineral collectors.

Geological Facts

The name is derived from the Greek word 'rhodon', meaning rosy. It was once commonly used in Russia to create architectural ornaments, such as the sarcophagi of czars. It is the state gemstone of Massachusetts, USA.

Field Identification & Locations

Identify in the field by its distinct pinkish-red color paired with black manganese oxide patterns and its relative hardness (it is harder than Rhodochrosite). Commonly found in Russia (Urals), Australia, Brazil, Canada, and the USA.

Identified on: 4/18/2026

Mode: Standard