mineral

Hematite pseudomorph after a fossil or mineralized object (likely iron-oxide concretion)

Hematite, Fe₂O₃, possibly limonite/goethite-bearing

AI-generated identification · may be incorrect

Black to dark gray, metallic-to-submetallic luster, rough botryoidal/crystalline surface; hematite hardness 5–6.5, no prominent cleavage, trigonal crystal structure, specific gravity about 5.0–5.3. The elongated form appears naturally mineralized or shaped, but the image alone cannot confirm its exact identity.

Identified August 30, 2026More mineral →

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Physical properties

Formation & geological history

Iron oxides form by oxidation of iron-rich minerals in hydrothermal veins, soils, cavities, and sedimentary environments; hematite deposits range from Precambrian banded iron formations to much younger weathering products. The shape may represent a pseudomorph, concretion, or fossil replacement.

Uses & applications

Hematite is an important iron ore, pigment, polishing abrasive, and ornamental stone; unusual pseudomorphs are mainly collector specimens.

Geological facts

A diagnostic red-brown streak on unglazed porcelain strongly supports hematite, while magnetism is usually weak or absent. Goethite- or magnetite-rich material may occur with it.

Field identification & locations

Common localities include Brazil, Australia, China, the United States, and Morocco. Test streak, magnetism, density, and inspect under magnification; avoid assuming it is a meteorite from appearance alone.