mineral

Rhodonite in Quartz Matrix

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

Hardness: 5.5-6.5 (Mohs), Color: Characteristic rose-pink with black manganese oxide inclusions, Luster: Vitreous to pearly, Crystal structure: Triclinic, Cleavage: Perfect, Specific gravity: 3.5-3.7

Hardness: 5

Identified March 30, 2026More mineral →

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Physical properties

Hardness: 5.5-6.5 (Mohs), Color: Characteristic rose-pink with black manganese oxide inclusions, Luster: Vitreous to pearly, Crystal structure: Triclinic, Cleavage: Perfect, Specific gravity: 3.5-3.7

Formation & geological history

Formed through hydrothermal processes or regional metamorphism of manganese-rich sediments. Often found in metamorphic rocks associated with manganese ores and can range from Precambrian to more recent geological ages.

Uses & applications

Used primarily as an ornamental stone, for lapidary work (cabochons and beads), gemstone jewelry, and occasionally as a minor ore of manganese.

Geological facts

Rhodonite is the official state gem of Massachusetts. Unlike Rhodochrosite, which is a carbonate, Rhodonite is a silicate and is much harder and more durable for jewelry. The name comes from the Greek 'rhodos,' meaning rosy.

Field identification & locations

Identify in the field by its distinct rose-pink color often accompanied by veins of black manganese oxide (pyrolusite). It is commonly found in Russia, Australia, Brazil, Canada, and the USA. Collectors look for high color contrast between the pink and black.

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