sedimentary

Brown beach pebble with iron-rich inclusion

Likely fine-grained sandstone or siltstone; inclusion possibly weathered ironstone/volcanic rock

AI-generated identification · may be incorrect

Mohs hardness approximately 5–7; smooth rounded surface, earthy brown color, dull to slightly waxy luster, and very fine granular texture. No obvious cleavage; density likely about 2.4–2.7 g/cm³.

Identified September 5, 2026More sedimentary →

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At a glance

Common name: Brown beach pebble with iron-rich inclusion
Scientific name: Likely fine-grained sandstone or siltstone; inclusion possibly weathered ironstone/volcanic rock
Category: sedimentary
Identified: September 5, 2026
Method: Standard

AI Estimated Value

Usually $1–$10 as an ordinary pebble; up to about $15–$30 if locally significant, unusually patterned, or sold as a polished specimen.

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 water-worn clast formed from compacted sand or silt, with a contrasting iron-rich or lithic fragment embedded near the edge. Exact geological age and source cannot be determined from the photograph.

Uses & applications

Primarily a collectible or decorative beach stone; similar material may be used as aggregate or landscaping stone, but this specimen has little industrial value.

Geological facts

The rounded shape indicates prolonged abrasion by surf, a river, or glacial transport. The dark reddish-brown patch may represent iron oxide cement, hematite-rich material, or a cemented pebble inclusion.

Field identification & locations

Look for subtle grains or bedding, a streak that is not strongly metallic red, and whether it scratches glass; these tests help distinguish sandstone from chert or basalt. Commonly found on beaches, river gravels, and glacial deposits.