sedimentary

Iron-rich sandstone or weathered ironstone

Ferruginous sandstone, commonly quartz (SiO₂) cemented or stained by iron oxides such as hematite (Fe₂O₃) and goethite (FeO(OH))

AI-generated identification · may be incorrect

Rusty orange-brown, dull to earthy luster, irregular granular texture, and apparent porous or weathered surfaces; typical hardness is about 6–7 for quartz-rich areas, with variable density and no obvious cleavage.

Identified September 6, 2026More sedimentary →

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At a glance

Common name: Iron-rich sandstone or weathered ironstone
Scientific name: Ferruginous sandstone, commonly quartz (SiO₂) cemented or stained by iron oxides such as hematite (Fe₂O₃) and goethite (FeO(OH))
Category: sedimentary
Identified: September 6, 2026
Method: Standard

AI Estimated Value

Typically $1–$10 as a common rough specimen; more unusual, well-documented or attractive pieces may sell for $10–$30.

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

Formed when sand accumulated and lithified, then became stained or cemented by oxidized iron-bearing fluids; it may range from ancient sedimentary rock to younger weathering crust, but age cannot be determined from the image.

Uses & applications

Used locally as building or paving stone and collected as a field specimen; attractive pieces may be used decoratively, though this example appears common and unpolished.

Geological facts

Iron oxides produce the orange, red, and brown coloration, while darker patches may represent concentrated iron minerals, manganese oxides, or inclusions.

Field identification & locations

Look for gritty grains, rusty streaking, and a scratch-resistant quartz component; sandstone commonly occurs in sedimentary basins and ironstone in weathered, oxidizing environments. A hand lens and streak, hardness, and acid tests would improve identification.