sedimentary

Likely weathered sandstone or iron-stained sedimentary pebble

Indeterminate clastic sedimentary rock; possibly quartz-rich sandstone

AI-generated identification · may be incorrect

Small rounded triangular fragment, brown-gray, dull to earthy luster, and apparently fine-grained with no visible crystals or cleavage. Estimated Mohs hardness 6–7 if quartz-rich; exact properties require testing.

Identified August 24, 2026More sedimentary →

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At a glance

Common name: Likely weathered sandstone or iron-stained sedimentary pebble
Scientific name: Indeterminate clastic sedimentary rock; possibly quartz-rich sandstone
Category: sedimentary
Identified: August 24, 2026
Method: Standard

AI Estimated Value

Generally $0–$5 as an unremarkable fragment; attractive patterned or fossil-bearing sandstone specimens may sell for approximately $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

Likely lithified sand or silt deposited in an ancient river, beach, dune, or shallow-marine environment, then weathered and rounded; its geological age cannot be determined from the photograph.

Uses & applications

Common sandstone is used for building stone, paving, aggregate, and decorative specimens; this small ordinary fragment has little commercial value.

Geological facts

The image is too low-resolution for confident mineral identification, and the object could also be a weathered concrete or ceramic fragment despite its rock-like appearance.

Field identification & locations

Look for gritty texture, visible sand grains, and weak layering; a glass-scratch test, dilute acid test, streak, and close-up inspection would help distinguish sandstone from concrete or ceramic. Sandstones occur worldwide, especially in sedimentary basins.