mineral

Weathered metallic-looking rock, possibly hematite-bearing ironstone

Hematite-rich ironstone; hematite Fe₂O₃, potentially with magnetite Fe₃O₄ and quartz

AI-generated identification · may be incorrect

Hardness about 5–6.5 Mohs; dark gray to brown with metallic or submetallic luster and iridescent surface tarnish. Typically massive rather than visibly crystalline, with a reddish-brown streak; specific gravity commonly 4.5–5.3.

Identified August 8, 2026More mineral →

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At a glance

Common name: Weathered metallic-looking rock, possibly hematite-bearing ironstone
Scientific name: Hematite-rich ironstone; hematite Fe₂O₃, potentially with magnetite Fe₃O₄ and quartz
Category: mineral
Identified: August 8, 2026
Method: Standard

AI Estimated Value

About $5–$30 for a common hand specimen; $50–$200+ for unusually lustrous, large, or well-formed specimens.

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 through oxidation or concentration of iron minerals in hydrothermal, sedimentary, or weathering environments; age cannot be determined from the photograph. The polished-looking sheen may result from natural weathering or surface abrasion.

Uses & applications

Used as an iron ore and pigment; attractive pieces are collected as mineral specimens. It is generally unsuitable for gemstone jewelry unless cut and polished.

Geological facts

Hematite’s diagnostic streak is red to reddish brown even when the specimen appears black or metallic. The image alone cannot distinguish hematite from magnetite, weathered ironstone, or an iron-rich meteorite.

Field identification & locations

Check the streak on unglazed porcelain, test magnetism, and inspect for metallic density; hematite is usually weakly magnetic or nonmagnetic, whereas magnetite is strongly magnetic. Common sources include Brazil, Australia, the United States, and India.