Rock Identifier
Rhodonite with Manganese Oxides (Rhodonite (Mn,Fe,Mg,Ca)SiO3) — metamorphic
metamorphic

Rhodonite with Manganese Oxides

Rhodonite (Mn,Fe,Mg,Ca)SiO3

Hardness: 5.5-6.5; Color: Pink, rose-red, or reddish-brown often with black dendritic inclusions; Luster: Vitreous to pearly; Crystal System: Triclinic; Specific Gravity: 3.5-3.7.

Hardness
5
Luster
Vitreous to pearly
Identified More metamorphic

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Physical properties

Hardness: 5.5-6.5; Color: Pink, rose-red, or reddish-brown often with black dendritic inclusions; Luster: Vitreous to pearly; Crystal System: Triclinic; Specific Gravity: 3.5-3.7.

Formation & geological history

Formed through the regional or contact metamorphism of manganese-rich sedimentary rocks or hydrothermal activity in manganese ore deposits. It occurs mostly in metamorphic rocks associated with other manganese minerals.

Uses & applications

Primarily used as an ornamental stone, for lapidary work (cabochons, beads), decorative carvings, and as a minor ore of manganese. Also highly popular in the metaphysical and gemstone collecting community.

Geological facts

The name comes from the Greek word 'rhodon', meaning rose. While it is the state gemstone of Massachusetts, the finest specimens are often cited as coming from the Ural Mountains in Russia or Australia.

Field identification & locations

Identified by its signature pink color and distinct black veins or patches of manganese oxide. Look for its hardness (it can scratch glass with difficulty) and lack of reaction to acid, which distinguishes it from Rhodochrosite.