sedimentary

Iron-stained sandstone or weathered ironstone

Quartz-rich sandstone with iron-oxide cement, chiefly hematite (Fe₂O₃) and/or goethite (FeO(OH))

AI-generated identification · may be incorrect

Hardness is roughly 6–7 for quartz grains, with earthy orange-brown iron staining; granular texture, dull to submetallic luster, and no obvious cleavage. The specimen appears weathered and porous, but the photo limits precise identification.

Identified August 27, 2026More sedimentary →

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At a glance

Common name: Iron-stained sandstone or weathered ironstone
Scientific name: Quartz-rich sandstone with iron-oxide cement, chiefly hematite (Fe₂O₃) and/or goethite (FeO(OH))
Category: sedimentary
Identified: August 27, 2026
Method: Standard

AI Estimated Value

Typically $1–$10 as an ordinary specimen; approximately $10–$30 if unusually attractive, well documented, or strongly iron-rich.

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-sized quartz grains were deposited, compacted, and cemented, later acquiring iron-oxide coatings during oxidation and weathering. Its exact age and depositional environment cannot be determined from the image.

Uses & applications

Common sandstone is used as building stone, paving, aggregate, and decorative material; iron-rich varieties may be collected as lapidary or geological specimens but are rarely gem-quality.

Geological facts

The orange-red coloration is produced by oxidized iron, analogous to rust. Stronger magnetic response would suggest magnetite-bearing ironstone rather than ordinary sandstone.

Field identification & locations

Look for visible sand grains, gritty texture, layered fabric, and a reddish-brown streak; hematite-rich material typically leaves a red-brown streak, while quartz does not. Common in oxidized sedimentary terrains worldwide.