mineral

Iron-rich hematite specimen

Hematite (α-Fe₂O₃), likely with limonite/goethite and host-rock impurities

AI-generated identification · may be incorrect

Rust-red to dark brown, earthy-to-submetallic luster, irregular fracture; hematite hardness 5–6.5 Mohs, trigonal crystal structure, no prominent cleavage. The image’s color and texture suggest an iron-oxide-rich, possibly weathered specimen.

Identified October 3, 2026More mineral →

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Physical properties

Formation & geological history

Forms through oxidation of iron-bearing minerals, chemical precipitation, or hydrothermal processes; specimens range from ancient sedimentary iron formations to younger weathering zones.

Uses & applications

Hematite is a major iron ore, used for steel production and red pigment; attractive pieces are collected, and polished material is sometimes used in jewelry.

Geological facts

Hematite’s reddish-brown streak is a useful diagnostic test and remains red even when the specimen itself looks nearly black.

Field identification & locations

Common in iron-rich sedimentary deposits and oxidized zones worldwide. A streak test on unglazed porcelain helps distinguish hematite from similar dark minerals; this rough specimen appears iron-oxide-rich, but exact identification requires testing.