sedimentary

Small rounded brown stone, likely weathered iron-rich rock

Indeterminate; possibly ferruginous sandstone, ironstone, or weathered basalt

AI-generated identification · may be incorrect

Brown-gray, dull to slightly earthy luster, rounded and irregularly textured; hardness is approximately 5–7 Mohs, but cannot be determined reliably from the photo. No visible crystals or cleavage; specific gravity is unavailable.

Identified September 11, 2026More sedimentary →

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At a glance

Common name: Small rounded brown stone, likely weathered iron-rich rock
Scientific name: Indeterminate; possibly ferruginous sandstone, ironstone, or weathered basalt
Category: sedimentary
Identified: September 11, 2026
Method: Standard

AI Estimated Value

Generally under $1 as an ordinary pebble; perhaps $2–$10 if unusually attractive or confirmed as a distinctive mineral 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

Likely a naturally weathered pebble formed by erosion and transport, possibly from an iron-rich sedimentary or volcanic source. Geological age and exact formation environment cannot be established visually.

Uses & applications

Common specimens have negligible commercial value and no practical industrial or jewelry use, though similar ironstones may be used as aggregate or decorative material.

Geological facts

The rusty brown coloration commonly results from iron-oxide minerals such as hematite or goethite coating or cementing the stone.

Field identification & locations

Test for a natural stone by checking for uneven texture, a non-glassy surface, and resistance to scratching; a streak test, magnet test, and close examination with magnification would improve identification. Rounded brown pebbles occur widely in streambeds, beaches, and glacial deposits.