mineral

Tumbled hematite

Hematite (α-Fe₂O₃), iron oxide

AI-generated identification · may be incorrect

Polished dark steel-gray stone with metallic to submetallic luster; Mohs hardness 5–6.5, trigonal crystal structure, and no prominent cleavage; notably dense, with a reddish-brown streak.

Identified October 12, 2026More mineral →

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Physical properties

Polished dark steel-gray stone with metallic to submetallic luster; Mohs hardness 5–6.5, trigonal crystal structure, and no prominent cleavage; notably dense, with a reddish-brown streak.

Formation & geological history

Forms through iron-rich sedimentary deposition, hydrothermal activity, or weathering and oxidation of iron minerals; occurrences range from ancient Precambrian deposits to younger formations.

Uses & applications

Used as iron ore and, when polished, in beads, jewelry, and ornamental carvings.

Geological facts

Hematite’s name derives from Greek for “blood,” referring to its characteristic red streak—even when the specimen appears silver-gray.

Field identification & locations

A dark metallic appearance and red-brown streak help distinguish hematite from lookalikes; major deposits occur in Australia, Brazil, China, and the Lake Superior region. This specimen’s identity cannot be confirmed from appearance alone.