sedimentary

Rounded quartz-rich pebble

Probable arkosic sandstone or weathered quartzite; exact identification is uncertain from the image

AI-generated identification · may be incorrect

Small, water-worn, tan-gray pebble with a granular texture and weakly visible mottling; likely quartz and feldspar. Quartz-rich material is about Mohs 6–7, with a vitreous to dull luster and no obvious cleavage.

Identified August 20, 2026More sedimentary →

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At a glance

Common name: Rounded quartz-rich pebble
Scientific name: Probable arkosic sandstone or weathered quartzite; exact identification is uncertain from the image
Category: sedimentary
Identified: August 20, 2026
Method: Standard

AI Estimated Value

Usually less than $1–$5 as a common pebble; potentially $10–$30 if it has distinctive provenance, fossil content, or unusual mineral features.

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 formed from cemented sand or metamorphosed sandstone, then rounded by stream or beach transport. Its precise geological age and formation locality cannot be determined visually.

Uses & applications

Primarily a natural pebble or collectible; not typically valuable for construction, jewelry, or industry unless it proves to be an unusual mineral or fossil-bearing specimen.

Geological facts

The rounded shape indicates prolonged abrasion during transport. A close examination with magnification may reveal individual sand grains, mineral fragments, or fossil textures.

Field identification & locations

Common in river gravels, beaches, glacial deposits, and landscaping stone. Identify by testing streak, hardness, grain texture, and acid reaction; a clear photo of fresh surfaces would improve confidence.