Rhodonite

Physical Properties

Hardness: 5.5-6.5 on Mohs scale; Color: Pink to rose-red with black manganese oxide veins; Luster: Vitreous to pearly; Crystal structure: Triclinic; Cleavage: Perfect in two directions; Specific gravity: 3.5-3.7.

Formation & Geological History

Formed primarily in metamorphic rocks through hydrothermal processes or contact metamorphism of manganese-rich sediments. Often found in hydrothermal veins and replacement deposits.

Uses & Applications

Used as an ornamental stone, in jewelry (cabochons and beads), and occasionally as a minor ore of manganese. Valued by collectors for its striking color.

Geological Facts

The name is derived from the Greek word 'rhodos', meaning rosy. It is the state gem of Massachusetts and is often confused with rhodochrosite, which lacks the black manganese veins.

Field Identification & Locations

Identify by its characteristic pink color paired with black dendritic veins. Look for it in high-grade metamorphic environments or manganese deposits in Russia, Australia, or the USA.

Identified on: 4/22/2026

Mode: Standard