metamorphic

Polished rhodonite

Rhodonite, manganese inosilicate (MnSiO₃), commonly with black manganese-oxide inclusions

AI-generated identification · may be incorrect

Pink to raspberry-red, opaque, with a vitreous-to-pearly polish and typical black dendritic/vein-like manganese oxides. Mohs hardness 5.5–6.5; triclinic crystal system; cleavage is good in two directions; specific gravity about 3.4–3.7.

Identified September 12, 2026More metamorphic →

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Physical properties

Formation & geological history

Forms mainly in manganese-rich metamorphic deposits and hydrothermal veins, often during regional metamorphism. It is commonly Paleozoic to Precambrian in age, depending on the deposit; the specimen is polished, so its original locality cannot be determined visually.

Uses & applications

Used as a decorative and lapidary stone for cabochons, carvings, beads, and tumbled stones; rarely used as a manganese ore. Attractive material is popular with collectors and jewelry makers.

Geological facts

The black markings are usually manganese oxides such as pyrolusite or hausmannite, creating the classic pink-and-black appearance. It can resemble pink jade, rose quartz, or dyed stone, but is generally denser and more opaque.

Field identification & locations

The image strongly fits rhodonite, though visual identification is not definitive. Rhodonite occurs in Oregon and the broader Pacific Northwest, making it regionally plausible near 45.4°N, 122.6°W; confirm with hardness, streak, density, or gemological testing.