sedimentary

Weathered sandstone or iron-stained river pebble

Quartz-rich sandstone; chiefly SiO₂ with iron-oxide coatings

AI-generated identification · may be incorrect

Tan-orange, fine-grained, dull to earthy luster, rounded and water-worn; likely Mohs hardness 6–7 for quartz grains but relatively friable overall. No visible crystals or cleavage; specific gravity typically 2.2–2.7.

Identified August 26, 2026More sedimentary →

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Physical properties

Formation & geological history

Likely lithified sand deposited in an ancient river, beach, dune, or shallow-marine environment, later exposed and rounded by erosion; age cannot be determined from appearance alone.

Uses & applications

Common sandstone is used as building stone, paving, aggregate, and sometimes decorative material; this small pebble has mainly educational or modest collecting value.

Geological facts

The orange-brown coloration typically comes from hematite or limonite cement/coatings. Its smooth form indicates prolonged abrasion in moving water or sediment.

Field identification & locations

Identify by its sandy texture, weak layering or pores, earthy streak, and lack of glassy crystalline structure; a steel nail may scratch soft cemented areas. Common worldwide in streambeds, beaches, and eroded sandstone terrains.