sedimentary

Iron-stained weathered rock, likely sandstone or ironstone

Ferruginous sandstone/ironstone; mainly quartz (SiO₂) with iron oxides such as hematite and goethite

AI-generated identification · may be incorrect

Typically Mohs 6–7 from quartz, brown-red streaking, dull to earthy luster, granular texture, and no obvious cleavage. The rounded, irregular shape indicates weathering and abrasion; exact identification requires a fresh surface and tests.

Identified August 22, 2026More sedimentary →

Explore Iron-stained weathered rock, likely sandstone or ironstone in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

At a glance

Common name: Iron-stained weathered rock, likely sandstone or ironstone
Scientific name: Ferruginous sandstone/ironstone; mainly quartz (SiO₂) with iron oxides such as hematite and goethite
Category: sedimentary
Identified: August 22, 2026
Method: Standard

AI Estimated Value

Usually $1–$10 as a common specimen; $10–$50 if unusually attractive, polished, or demonstrably collectible.

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 when silica-rich sediment was cemented and later impregnated by oxidized iron-bearing groundwater; weathering produced the rusty coating. The age cannot be determined from the photograph and may range from ancient to relatively young sedimentary deposits.

Uses & applications

Used locally as building stone, aggregate, or iron-rich material; ordinary pieces have little jewelry value. Attractive polished ironstone can be used for cabochons and decorative objects.

Geological facts

Iron oxides create the characteristic orange, red, and brown colors and may increase density. It could also represent a weathered iron-rich concretion, which can look similar.

Field identification & locations

Common in exposed sedimentary terrains and ironstone gravels worldwide. Check for quartz grains or bedding, test hardness against glass, inspect streak color, and use a magnet only if magnetite is present.