sedimentary

Weathered iron-rich sandstone or laterite fragment

Ferruginous sandstone, chiefly quartz (SiO₂) cemented or stained by iron oxides/hydroxides

AI-generated identification · may be incorrect

Hardness about 5–7 where quartz-rich; rusty orange-brown, granular, dull to earthy luster, with irregular fracture and no obvious cleavage. The porous, rough texture and iron staining are consistent with weathered sandstone or lateritic material.

Identified August 9, 2026More sedimentary →

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At a glance

Common name: Weathered iron-rich sandstone or laterite fragment
Scientific name: Ferruginous sandstone, chiefly quartz (SiO₂) cemented or stained by iron oxides/hydroxides
Category: sedimentary
Identified: August 9, 2026
Method: Standard

AI Estimated Value

Usually $0–$10 as an unprovenanced fragment; attractive or locality-labeled specimens may sell for roughly $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

Likely formed from quartz sand lithified and later impregnated by iron oxides during oxidation and weathering; its precise geological age cannot be determined from the photograph. Common in terrestrial sedimentary basins and tropical weathering profiles.

Uses & applications

Common material has little commercial value, though ferruginous sandstone may be used locally as aggregate, building stone, or decorative landscaping rock.

Geological facts

The orange-brown coloration typically comes from hematite and goethite rather than abundant orange minerals. A magnet may show weak attraction if magnetite is present, but iron staining alone is not strongly magnetic.

Field identification & locations

Look for visible sand grains, rusty cement, pores, and streaking; it differs from solid iron ore by its granular sandstone texture. Common worldwide, especially Australia, India, Africa, and weathered continental regions.