sedimentary

Rounded weathered pebble, likely sandstone or altered limestone

Indeterminate clastic carbonate/siliciclastic rock; exact identification requires a fresh surface and tests

AI-generated identification · may be incorrect

Tan-gray, fine-grained, dull and strongly weathered, with a rounded water-worn shape; likely hardness ~3–6 Mohs depending on carbonate or quartz content. No visible crystals, cleavage, or diagnostic layering is apparent.

Identified August 9, 2026More sedimentary →

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At a glance

Common name: Rounded weathered pebble, likely sandstone or altered limestone
Scientific name: Indeterminate clastic carbonate/siliciclastic rock; exact identification requires a fresh surface and tests
Category: sedimentary
Identified: August 9, 2026
Method: Standard

AI Estimated Value

Usually under $1; approximately $2–$10 if personally collected as an attractive specimen, unless testing reveals a rarer material.

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 a naturally transported stream or beach pebble, rounded by abrasion and coated by weathering; its original sedimentary age and source cannot be determined from the photograph.

Uses & applications

Generally a common natural pebble with little commercial value; suitable for decoration, landscaping, or educational collection rather than jewelry or construction.

Geological facts

The pale, earthy surface may be a weathering rind, and the small pits could reflect dissolved carbonate grains or weathered pores.

Field identification & locations

Test a hidden spot for effervescence with dilute hydrochloric acid or vinegar, though weak fizzing may be inconclusive; a steel nail tests hardness, while a fresh fracture reveals texture. Common in riverbeds, beaches, and glacial deposits worldwide.