mineral
Hematite Mineral Ore
Iron(III) oxide (Fe2O3)
AI-generated identification · may be incorrectHardness: 5.5-6.5; Color: Dark grey to reddish-black; Luster: Metallic to dull/earthy; Crystal Structure: Trigonal; Cleavage: None; Specific Gravity: 5.26
- Hardness
- 5
- Color
- Dark grey to reddish-black
- Luster
- Metallic to dull/earthy
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Physical properties
Hardness: 5.5-6.5; Color: Dark grey to reddish-black; Luster: Metallic to dull/earthy; Crystal Structure: Trigonal; Cleavage: None; Specific Gravity: 5.26
Formation & geological history
Formed in sedimentary Banded Iron Formations (BIFs) through precipitation in ancient oceans or as a sublimation product in volcanic areas; common in Precambrian rocks.
Uses & applications
Primary ore of iron for steel manufacturing, pigment in paints/cosmetics (ochre), polishing compounds (jeweler's rouge), and semi-precious gemstones for jewelry.
Geological facts
The name comes from the Greek word for blood 'haima' due to the reddish streak it leaves; it is the most important ore of iron in the world.
Field identification & locations
Identified by its characteristic reddish-brown streak on a porcelain plate, high density/heaviness, and dark metallic appearance. Found globally in large deposits like Lake Superior region and Brazil.
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Sandstone (with potential mineral staining/concretions)
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Epidote
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Igneous Pegmatite
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Granite
Granite (Phaneritic intrusive igneous rock)
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