sedimentary

Weathered sandstone or iron-rich sedimentary rock fragments

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

AI-generated identification · may be incorrect

Visible pieces are tan to reddish-brown, granular, and dull to earthy, with apparent sand-sized grains and iron-oxide staining. Likely hardness about 6–7 for quartz grains, but the rock may crumble; no reliable cleavage is visible.

Identified August 26, 2026More sedimentary →

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At a glance

Common name: Weathered sandstone or iron-rich sedimentary rock fragments
Scientific name: Quartz-rich sandstone, locally ferruginous; exact identification requires testing
Category: sedimentary
Identified: August 26, 2026
Method: Standard

AI Estimated Value

Typically $0–$5 for loose common fragments; attractive patterned or fossiliferous sandstone specimens may sell for $10–$50.

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 lithified sand deposited in a terrestrial or shallow-marine environment, then cemented by silica, carbonate, or iron oxides and later weathered. Geological age cannot be determined from the photograph.

Uses & applications

Common sandstone is used as building stone, paving, aggregate, and a reservoir rock; these small weathered fragments have negligible practical or decorative value.

Geological facts

The reddish-brown coloration commonly results from hematite or limonite coating quartz grains. The pale slab beneath appears manufactured concrete or stone paving, not part of the specimen.

Field identification & locations

Look for clearly visible sand grains, gritty texture, and layering; a glass scratch test can help confirm quartz-rich material, while dilute hydrochloric acid tests carbonate cement. Common worldwide, especially in sedimentary basins.