mineral
Hematite
Hematite (Fe2O3)
Hardness: 5.5 to 6.5 on Mohs scale; Color: Steel gray to black, reddish-brown when powdered; Luster: Metallic to submetallic; Crystal Structure: Trigonal; Cleavage: None, exhibits parting; Specific Gravity: 5.3
- Hardness
- 5
- Color
- Steel gray to black, reddish-brown when powdered
- Luster
- Metallic to submetallic
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Physical properties
Hardness: 5.5 to 6.5 on Mohs scale; Color: Steel gray to black, reddish-brown when powdered; Luster: Metallic to submetallic; Crystal Structure: Trigonal; Cleavage: None, exhibits parting; Specific Gravity: 5.3
Formation & geological history
Forms in diverse environments including hydrothermal veins, sedimentary deposition in marine or lake environments (banded iron formations), and as a weathering product of iron-rich rocks.
Uses & applications
Primary ore of iron, used in jewelry, ornamental carvings, magnetic therapy items, and as a pigment.
Geological facts
Hematite is the most important ore of iron worldwide and is also found on Mars, giving the planet its reddish hue.
Field identification & locations
Easily identified by its characteristic reddish-brown streak, metallic luster, and high specific gravity. Common worldwide, especially in areas with banded iron formations.
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