sedimentary

Likely iron-rich sandstone or weathered hematite-bearing rock

Quartz-rich sandstone, possibly ferruginous sandstone (SiO₂ with iron oxides such as hematite/goethite)

AI-generated identification · may be incorrect

Brown-red, dull to earthy luster, visibly granular and fine-grained, with uneven fracture and no obvious cleavage. Likely Mohs hardness about 5–7, though loose grains may scratch more easily; specific gravity is variable, commonly 2.3–3.0.

Identified September 8, 2026More sedimentary →

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At a glance

Common name: Likely iron-rich sandstone or weathered hematite-bearing rock
Scientific name: Quartz-rich sandstone, possibly ferruginous sandstone (SiO₂ with iron oxides such as hematite/goethite)
Category: sedimentary
Identified: September 8, 2026
Method: Standard

AI Estimated Value

Approximately $1–$10 for an ordinary hand specimen; $10–$30 if unusually colorful, polished, or locality-labeled.

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 from compacted and cemented sand, later stained or cemented by iron oxides during weathering. Its precise geological age cannot be determined from the photograph.

Uses & applications

Common sandstone is used for building stone, paving, aggregate, and decorative pieces; iron-rich varieties are mainly collected as geological specimens. It has little jewelry value unless unusually attractive or polished.

Geological facts

The reddish-brown color commonly comes from microscopic hematite coating quartz grains. A streak test, hardness test, and acid test would help distinguish it from iron ore, chert, or a metamorphic rock.

Field identification & locations

Look for sand-sized quartz grains and rusty cement; quartz-rich pieces should scratch glass, while hematite-rich material leaves a reddish-brown streak. Common worldwide, especially in arid and oxidizing sedimentary environments.