sedimentary

Likely weathered brown stone, possibly iron-rich sandstone or chert

Indeterminate from image; possible ferruginous sandstone (quartz + iron oxides) or iron-rich chert

AI-generated identification · may be incorrect

Brown, opaque, dull to weakly earthy luster, apparently fine-grained and rounded; hardness likely about 5–7 Mohs if sandstone/chert. No reliable cleavage or crystal structure is visible, and the photograph is too blurred for confident identification.

Identified August 14, 2026More sedimentary →

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At a glance

Common name: Likely weathered brown stone, possibly iron-rich sandstone or chert
Scientific name: Indeterminate from image; possible ferruginous sandstone (quartz + iron oxides) or iron-rich chert
Category: sedimentary
Identified: August 14, 2026
Method: Standard

AI Estimated Value

$1–$10 common rough material; approximately $20–$50 for attractive polished or unusual specimens

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

Could form as quartz-rich sediment cemented with iron oxides, or as silica-rich chemical sediment; age and locality cannot be determined visually. The rounded shape suggests transport and abrasion in a river, beach, or gravel deposit.

Uses & applications

Common material has little commercial value, though sandstone may be used as aggregate or building stone and chert as road material or toolstone. Attractive pieces can be collected as lapidary rough.

Geological facts

Iron oxides commonly produce brown, red, and yellow coloration in otherwise silica-rich rocks. A fresh streak, hardness test, and close examination of grain size would distinguish sandstone from massive chert.

Field identification & locations

Look for visible sand grains and rough texture in sandstone; chert is smoother, waxy, and may show conchoidal fractures. Common worldwide in sedimentary basins and gravel beds; value is typically $1–$10 for an ordinary specimen, or up to $20–$50 if distinctive and polished.