mineral

Polished Hematite Tower

Hematite (Fe2O3)

Hardness: 5.5-6.5 on the Mohs scale; Color: Metallic dark grey to black, red-brown streak; Luster: Metallic to sub-metallic; Crystal structure: Trigonal; Specific gravity: ~5.26.

Hardness: 5
Color: Metallic dark grey to black, red-brown streak
Luster: Metallic to sub-metallic

Identified July 24, 2026More mineral →

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Physical properties

Hardness: 5.5-6.5 on the Mohs scale; Color: Metallic dark grey to black, red-brown streak; Luster: Metallic to sub-metallic; Crystal structure: Trigonal; Specific gravity: ~5.26.

Formation & geological history

Formed as a primary mineral and as an alteration product in sedimentary, igneous, and metamorphic rocks through the oxidation of iron-rich minerals, often in banded iron formations.

Uses & applications

Major ore of iron, used in heavy industry, radiation shielding, pigments, polishing compounds, and cut/carved decorative specimens like towers, beads, and cabochons.

Geological facts

Hematite leaves a distinctive rust-red to reddish-brown streak, even though it appears metallic gray or black on polished surfaces. It is also found in vast quantities on Mars, giving the Red Planet its color.

Field identification & locations

Identify by high density (heavy in hand), metallic gray color, and reddish-brown streak test. Commonly found in Brazil, South Africa, Australia, China, and Lake Superior region USA.