sedimentary

Weathered iron-rich sandstone or lateritic rock

Ferruginous sandstone, primarily quartz (SiO₂) with iron oxides such as hematite/goethite

AI-generated identification · may be incorrect

Tan to rusty brown, earthy to dull luster, visibly granular and porous; individual grains suggest quartz cemented by iron oxides. Typical hardness is about 6–7 for quartz grains, with variable overall toughness and no obvious cleavage.

Identified September 13, 2026More sedimentary →

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At a glance

Common name: Weathered iron-rich sandstone or lateritic rock
Scientific name: Ferruginous sandstone, primarily quartz (SiO₂) with iron oxides such as hematite/goethite
Category: sedimentary
Identified: September 13, 2026
Method: Standard

AI Estimated Value

Common loose specimens: approximately $1–$10; generally little commercial value unless unusually colored, fossiliferous, or from a notable locality.

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

Likely formed from deposited sand later cemented by silica and iron oxides, then exposed and weathered at the surface; exact geological age cannot be determined from the image. Iron-rich weathering commonly develops in warm, oxygenated soils and sedimentary environments.

Uses & applications

Used locally as construction aggregate, road material, or decorative stone; attractive pieces may be collected, but this specimen is not gem quality.

Geological facts

The rusty coloration comes from oxidized iron rather than copper. Its rough, granular texture and porous weathering distinguish it from a metallic meteorite or crystalline mineral.

Field identification & locations

Look for sand-sized grains, rusty staining, and a streak that may be yellow-brown to reddish; it should not show metallic magnetism unless unusually iron-rich. Common in weathered sedimentary terrains worldwide.