mineral

Iron-stained quartz pebble

Quartz (SiO₂), with iron-oxide staining; exact variety uncertain

AI-generated identification · may be incorrect

Mostly opaque cream-colored quartz with a rusty ochre-brown surface and irregular, slightly pitted texture. Quartz has Mohs hardness 7, vitreous luster when fresh, and no cleavage; the specimen appears water-worn and rounded.

Identified September 30, 2026More mineral →

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Physical properties

Formation & geological history

Likely formed as quartz in a vein or quartz-rich rock, then weathered and transported; iron oxides stained its surface. Quartz occurs in rocks of many geological ages, so age cannot be determined from the image.

Uses & applications

Small pieces are mainly collected or used decoratively; quartz is widely used in glassmaking, abrasives, and electronics. This specimen is not gem-quality.

Geological facts

Iron-oxide coatings commonly produce yellow, orange, and brown colors on otherwise pale quartz.

Field identification & locations

Look for hardness near 7, lack of cleavage, and a pale interior beneath the rusty coating. Quartz pebbles are common in river and beach gravels worldwide; a photo alone cannot establish the exact variety.