sedimentary

Likely weathered sandstone or iron-rich sedimentary pebble

Quartz-rich sandstone, possibly ferruginous sandstone; exact identification requires testing

AI-generated identification · may be incorrect

Tan, porous, dull to earthy luster with dark brown iron-oxide specks; likely Mohs hardness 5–7, depending on cement, with no obvious cleavage. The rounded shape suggests abrasion or natural weathering, though the surface may be shaped or coated.

Identified August 24, 2026More sedimentary →

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At a glance

Common name: Likely weathered sandstone or iron-rich sedimentary pebble
Scientific name: Quartz-rich sandstone, possibly ferruginous sandstone; exact identification requires testing
Category: sedimentary
Identified: August 24, 2026
Method: Standard

AI Estimated Value

Typically $1–$10 for an ordinary pebble; unusual texture or provenance may raise value to roughly $10–$30.

Not an official valuation

AI estimate for general interest only — not an appraisal. Actual value depends on condition, provenance, and market demand. Verify with a professional before buying, selling, or insuring.

This identification was generated by AI and may contain errors. Verify important details before relying on them — and never use an AI result to judge whether a specimen is safe to handle. Read the full disclaimer

Physical properties

Formation & geological history

Probably formed from compacted quartz-rich sand cemented by silica, calcite, or iron oxides, then weathered and rounded in a stream, beach, or soil environment. Its depositional age cannot be determined from the image.

Uses & applications

Common sandstone is used as building and paving stone, aggregate, and decorative material; small pieces are mainly inexpensive curios or craft stones.

Geological facts

Iron oxides commonly produce tan, orange, and brown coloration, while visible pores indicate weathering or weak cementation.

Field identification & locations

Check for gritty texture, grains under magnification, and a white streak; sandstone usually does not fizz in dilute hydrochloric acid unless calcite-cemented. Likely locations include sedimentary terrains worldwide.