sedimentary

Iron-rich sandstone or weathered laterite fragment

Quartz-rich sandstone, possibly ferruginous sandstone (SiO₂ with iron oxides such as hematite/goethite)

AI-generated identification · may be incorrect

Brown-gray, dull to slightly earthy luster, visibly granular and porous, with no obvious cleavage; likely hardness about 5–7 where quartz-rich, but softer if highly weathered. The reddish-brown coloration suggests iron-oxide cement or staining.

Identified August 16, 2026More sedimentary →

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At a glance

Common name: Iron-rich sandstone or weathered laterite fragment
Scientific name: Quartz-rich sandstone, possibly ferruginous sandstone (SiO₂ with iron oxides such as hematite/goethite)
Category: sedimentary
Identified: August 16, 2026
Method: Standard

AI Estimated Value

Usually $0–$5 as an ordinary fragment; roughly $5–$20 if unusually attractive, locality-labeled, or part of a curated 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

Most likely formed from cemented sand grains in a sedimentary environment, with later oxidation during weathering; exact age and locality cannot be determined from the photograph. It may alternatively be a weathered lateritic rock.

Uses & applications

Common material has limited collector value and may be used locally as aggregate or building stone; attractive ferruginous varieties can be cut or displayed.

Geological facts

Iron oxides commonly produce red, orange, brown, and purple colors in sandstone and weathered rocks. The specimen’s rough granular texture distinguishes it from a glassy volcanic rock or metallic ore.

Field identification & locations

Look for individual sand grains, gritty texture, layered bedding, and a rusty red streak; a steel nail may scratch heavily weathered areas. Common worldwide, especially in arid, tropical, and sedimentary regions.