metamorphic

Weathered iron-rich rock, possibly limonite-bearing quartzite or ironstone

Goethite–hematite/limonite with quartz; exact identification requires testing

AI-generated identification · may be incorrect

Hardness commonly 5–7 (depending on quartz content), brown to ochre with dark gray areas, earthy to submetallic luster, massive and non-cleavable; yellow-brown streak may indicate limonite/goethite, while a red-brown streak suggests hematite.

Identified September 5, 2026More metamorphic →

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At a glance

Common name: Weathered iron-rich rock, possibly limonite-bearing quartzite or ironstone
Scientific name: Goethite–hematite/limonite with quartz; exact identification requires testing
Category: metamorphic
Identified: September 5, 2026
Method: Standard

AI Estimated Value

Approximately $5–$30 as a common hand specimen; attractive, locality-documented pieces may sell for $30–$100.

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 oxidation and weathering of an iron-bearing rock or hydrothermal/metamorphic mineralization; the specimen’s geological age and locality cannot be determined from the image alone.

Uses & applications

Used mainly as a teaching or collecting specimen; iron oxides historically served as pigments and minor iron ore, while quartz-rich material may be decorative but is generally not gem quality.

Geological facts

The ochre coloration is characteristic of hydrated iron oxides, especially goethite and limonite. A strong magnet response would suggest magnetite or abundant iron-rich minerals.

Field identification & locations

Identify with streak, hardness, magnetism, and acid tests: quartz scratches glass, hematite leaves a red-brown streak, and limonite a yellow-brown streak. Common in weathering zones, iron deposits, and oxidized veins worldwide.