sedimentary

Likely weathered sandstone or iron-rich conglomeratic fragment

Quartz-rich sandstone, possibly ferruginous sandstone (SiO₂-dominated)

AI-generated identification · may be incorrect

Brown, dull to earthy luster, visibly granular and irregular; likely Mohs hardness 6–7 for quartz grains but weakly cemented overall. No clear cleavage or crystal faces; specific gravity commonly about 2.2–2.7.

Identified August 30, 2026More sedimentary →

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At a glance

Common name: Likely weathered sandstone or iron-rich conglomeratic fragment
Scientific name: Quartz-rich sandstone, possibly ferruginous sandstone (SiO₂-dominated)
Category: sedimentary
Identified: August 30, 2026
Method: Standard

AI Estimated Value

Usually $1–$5 as an ordinary hand specimen; potentially $5–$20 if distinctive, locality-labeled, or unusually attractive.

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 formed when sand-sized quartz and rock fragments were compacted and cemented, with iron oxides producing the brown color; age cannot be determined from the photograph. Weathering may have rounded and roughened the surface.

Uses & applications

Common sandstone is used for building stone, paving, aggregate, and landscaping, though this small specimen has primarily educational or personal collecting value.

Geological facts

The rusty-brown coloration commonly comes from hematite or limonite coatings between quartz grains. The image is insufficient for a definitive identification; a fresh broken surface and a hand lens would help.

Field identification & locations

Look for individual sand grains, gritty texture, and resistance to scratching by a steel knife; quartz-rich material should scratch glass, while weak cement may crumble. Common worldwide, especially in sedimentary basins.