sedimentary

Weathered iron-rich rock, possibly ironstone

Likely ferruginous sandstone or ironstone; exact identification is uncertain from the photo

AI-generated identification · may be incorrect

Rusty reddish-brown, dull and granular with irregular surfaces; likely dominated by iron oxides such as hematite or goethite cementing sand-sized grains. Hardness and density cannot be determined reliably from the image.

Identified October 6, 2026More sedimentary →

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At a glance

Common name: Weathered iron-rich rock, possibly ironstone
Scientific name: Likely ferruginous sandstone or ironstone; exact identification is uncertain from the photo
Category: sedimentary
Identified: October 6, 2026
Method: Standard

AI Estimated Value

About $1-$10 for an ordinary loose specimen; typically little commercial value without distinctive features or verified provenance.

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

Iron-rich sediments can become cemented by iron oxides during burial or groundwater alteration; age depends on the source formation. The reported Las Vegas-area location makes local iron-stained sedimentary material plausible, but does not establish its origin.

Uses & applications

Usually a collecting specimen; ironstone and ferruginous sandstone have limited use unless present in sufficiently large, iron-rich deposits.

Geological facts

The rusty color commonly comes from oxidized iron minerals, rather than metallic iron.

Field identification & locations

Look for gritty grains and a rusty streak; a steel nail scratch test and streak test can help distinguish cemented sandstone from a solid iron-oxide mineral. The small, weathered specimen is not identifiable to a specific rock unit from this view.