sedimentary

Weathered sandstone or iron-stained sedimentary rock

Likely quartz-rich sandstone (SiO₂) with iron-oxide staining; exact identification requires testing

AI-generated identification · may be incorrect

Tan to ochre, dull earthy luster, visibly granular and porous with irregular weathering. Likely Mohs hardness about 6–7 for quartz grains, but weak cement may crumble; no obvious cleavage or crystals are visible.

Identified September 10, 2026More sedimentary →

Explore Weathered sandstone or iron-stained sedimentary rock in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

At a glance

Common name: Weathered sandstone or iron-stained sedimentary rock
Scientific name: Likely quartz-rich sandstone (SiO₂) with iron-oxide staining; exact identification requires testing
Category: sedimentary
Identified: September 10, 2026
Method: Standard

AI Estimated Value

Usually $1–$10 as an ordinary hand specimen; potentially $10–$30 if it has unusual color, provenance, or fossil/texture features.

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 lithified sand cemented by silica, calcite, or iron oxides, then exposed and weathered at the surface; age cannot be determined from the photograph. Its rough texture and rusty color suggest oxidation of iron-bearing minerals.

Uses & applications

Common sandstone is used as building stone, paving, aggregate, and decorative rock; this small specimen has mainly educational or collectible value.

Geological facts

Iron oxides such as hematite and goethite commonly produce yellow, orange, and reddish-brown sandstone coloration. The apparent granular texture distinguishes it from most massive igneous rocks.

Field identification & locations

Look for sand-sized quartz grains, layered bedding, and a gritty feel; a hand lens and dilute hydrochloric acid can help detect carbonate cement. Common worldwide in former beaches, dunes, river channels, and deserts.