metamorphic

Weathered iron-rich metamorphic rock

Likely iron-stained quartzite or metasedimentary rock; exact identification requires testing

AI-generated identification · may be incorrect

Brown-orange, fine- to medium-grained surface with rusty iron-oxide staining and thin pale veins, likely quartz; dull to subtly granular luster. Estimated Mohs hardness 6–7 if quartz-rich, with no obvious cleavage; dense and massive.

Identified September 18, 2026More metamorphic →

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Physical properties

Formation & geological history

Probably formed when quartz-rich sandstone or sediment was buried, heated, and metamorphosed, then oxidized during surface weathering. Precise age and geological setting cannot be determined from the image.

Uses & applications

Potentially usable as decorative landscape stone, aggregate, or a specimen; generally unsuitable for gemstone use unless polishing reveals attractive patterns.

Geological facts

The orange-brown coloration commonly comes from hematite and limonite produced by oxidation of iron-bearing minerals. Pale vein networks may represent quartz-filled fractures.

Field identification & locations

Test a fresh surface: quartzite scratches glass and resists a steel knife; dilute hydrochloric acid should not fizz. Common in metamorphic belts worldwide, but the specimen’s locality is essential for a precise name.