mineral

Hematite

Iron(III) oxide (Fe2O3)

Hardness of 5.5 to 6.5 on the Mohs scale, metallic to dull luster, steel-gray to black color, and a characteristic reddish-brown streak.

Identified October 22, 2026More mineral →

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Physical properties

Hardness of 5.5 to 6.5 on the Mohs scale, metallic to dull luster, steel-gray to black color, and a characteristic reddish-brown streak.

Forms in diverse geological environments, particularly hydrothermal veins, sedimentary iron formations, and volcanic deposits over millions of years.

Primary ore of iron for steel production, pigment manufacturing, and used occasionally in polished jewelry and carvings.

Hematite is the most abundant iron oxide mineral on Earth and has also been detected in significant quantities on the planet Mars.

Easily identified by its distinctive reddish-brown streak when scratched unglazed porcelain, alongside its heavy metallic weight.

Gneiss or Schist

Gneiss or Mica Schist with Garnet

Limonite

FeO(OH)•nH2O

Sandstone (with potential mineral staining/concretions)

Arenite (SiO2 based)

Feldspar

Feldspar Group (Tectosilicate, e.g., KAlSi3O8)

Tumbled granite

Granite, a coarse-grained felsic intrusive igneous rock

Pegmatite with Tourmaline and Quartz

Igneous Pegmatite