mineral

Rhodonite

Rhodonite (Manganese Iron Magnesium Calcium Silicate - (Mn,Fe,Mg,Ca)SiO3)

Hardness: 5.5-6.5 on Mohs scale; Color: Pink, rose-red, or brownish red, often with black manganese oxide veins; Luster: Vitreous to pearly; Crystal structure: Triclinic; Cleavage: Perfect in two directions.

Hardness: 5
Luster: Vitreous to pearly

Identified April 13, 2026More mineral →

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Physical properties

Formation & geological history

Formed in metamorphic rocks rich in manganese, and also in hydrothermal veins and replacement deposits. It is often found associated with other manganese minerals like rhodochrosite.

Uses & applications

Primarily used as a gemstone for jewelry (cabochons and beads) and as an ornamental stone for carvings and decorative objects. It also serves as a secondary ore of manganese.

Geological facts

The name comes from the Greek word 'rhodos', meaning rosy. It is the state gemstone of Massachusetts, USA. Unlike rhodochrosite, it is hard enough to be used in rings and is easily identifiable by its black 'dendritic' manganese veins.

Field identification & locations

Identify in the field by its characteristic pink color and the presence of black veins/spots of manganese oxide. Commonly found in Russia (Urals), Sweden, Australia, Brazil, and the USA (New Jersey and Colorado). Smaller pieces are common in river cobbles in specific regions.

Other mineral specimens

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Sandstone (with potential mineral staining/concretions)

Arenite (SiO2 based)

sedimentary

Schist

Metamorphic

Epidote

Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)

metamorphic

Nephrite Jade

Nephrite

Mineral/Rock

Banded Gneiss (River Rock/Pebble)

Gneiss (specifically a banded variety often found as a river rock)

Metamorphic Rock

Green Apatite on Albite

Fluorapatite [Ca5(PO4)3F] on Albite [Na(AlSi3O8)]

mineral