sedimentary

Iron-rich banded rock, likely goethite/limonite-rich ironstone

Goethite (α-FeO(OH)) and/or limonite with iron-oxide-stained silica or clay; exact identification requires testing

AI-generated identification · may be incorrect

Brown to rusty-orange, earthy to submetallic luster, with visible wavy bands; hardness and specific gravity cannot be reliably determined from the image. Goethite is typically Mohs 5–5.5 and orthorhombic; limonite is a variable mixture rather than a single mineral.

Identified September 29, 2026More sedimentary →

Explore Iron-rich banded rock, likely goethite/limonite-rich 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-rich banded rock, likely goethite/limonite-rich ironstone
Scientific name: Goethite (α-FeO(OH)) and/or limonite with iron-oxide-stained silica or clay; exact identification requires testing
Category: sedimentary
Identified: September 29, 2026
Method: Standard

AI Estimated Value

About $1–$15 for a small, common hand specimen; higher prices require confirmed identity or unusual display quality.

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 by iron minerals precipitating in sediment or by weathering and oxidation of iron-bearing rock; such deposits range widely in age and setting.

Uses & applications

Iron ores are used in steelmaking; attractive banded pieces may be kept as inexpensive display or educational specimens.

Geological facts

Rust-colored iron oxides and hydroxides commonly create striking layered patterns as groundwater moves through sediment.

Field identification & locations

Look for a heavy feel, rusty streak, and brown-yellow coloration; a streak test and hardness test can help distinguish iron oxides from other banded rocks. Similar material occurs in ironstone and weathered iron deposits worldwide.