mineral

Specular Hematite (Iron Ore)

Iron(III) oxide (Fe2O3)

Hardness: 5.5–6.5 (Mohs scale), Color: Metallic gray to black, Luster: Metallic to sub-metallic, Crystal Structure: Trigonal, Cleavage: None, Specific Gravity: 5.26

Hardness: 5

Identified April 9, 2026More mineral →

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Physical properties

Hardness: 5.5–6.5 (Mohs scale), Color: Metallic gray to black, Luster: Metallic to sub-metallic, Crystal Structure: Trigonal, Cleavage: None, Specific Gravity: 5.26

Formation & geological history

Formed in banded iron formations through sedimentary precipitation, or in hydrothermal veins and metamorphic settings. Often over 2 billion years old in major deposits.

Uses & applications

Primary ore of iron and steel production. Also used as a polishing agent (jeweler's rouge), in pigments, and as a popular semi-precious stone for beads and carvings.

Geological facts

Hematite is known as the 'blood stone' because its streak and powdered form are bright red, even though the crystal looks metallic black. It is also found in abundance on the surface of Mars.

Field identification & locations

Identify in the field by its high weight (high density) and by performing a streak test on unglazed porcelain, which will leave a distinct reddish-brown mark. Commonly found in Michigan (USA), Brazil, and Australia.

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Sandstone (with potential mineral staining/concretions)

Arenite (SiO2 based)

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Epidote

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Nephrite Jade

Nephrite

Mineral/Rock

Banded Gneiss (River Rock/Pebble)

Gneiss (specifically a banded variety often found as a river rock)

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Green Apatite on Albite

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Epidote - Ca2(Al2,Fe3+)3(SiO4)3(OH)

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