mineral

Hematite (likely Botryoidal or Specularite variant)

Iron(III) oxide (Fe2O3)

AI-generated identification · may be incorrect

Hardness: 5.5-6.5; Color: Steel-gray to black, reddish-brown streak; Luster: Metallic to sub-metallic; Crystal Structure: Trigonal; Specific Gravity: 5.26

Hardness: 5
Color: Steel-gray to black, reddish-brown streak
Luster: Metallic to sub-metallic

Identified July 4, 2026More mineral →

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Physical properties

Hardness: 5.5-6.5; Color: Steel-gray to black, reddish-brown streak; Luster: Metallic to sub-metallic; Crystal Structure: Trigonal; Specific Gravity: 5.26

Formation & geological history

Forms as a primary mineral and an alteration product in igneous, metamorphic, and sedimentary rocks. Often found in banded iron formations or as a precipitate from hot mineral springs.

Uses & applications

The main ore of iron for steel production; used as a pigment (ochre), in jewelry as beads or intaglios, and for polishing compounds (jeweller's rouge).

Geological facts

The name is derived from the Greek word for blood 'haima' because it turns red when powdered. It is also found in large quantities on the surface of Mars, giving the planet its reddish hue.

Field identification & locations

Identify by its high density and characteristic brick-red streak when rubbed against an unglazed porcelain plate. Common in locations like the Lake Superior district (USA), Brazil, and Australia.