mineral
Hematite
Iron(III) oxide (Fe2O3)
AI-generated identification · may be incorrectHardness: 5.5-6.5 (Mohs), Color: Steel-gray to black, metallic luster, Trigonal crystal system, No cleavage, Specific Gravity: 5.26
- Hardness
- 5
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Physical properties
Hardness: 5.5-6.5 (Mohs), Color: Steel-gray to black, metallic luster, Trigonal crystal system, No cleavage, Specific Gravity: 5.26
Formation & geological history
Formed in sedimentary environments through precipitation from water or as a metamorphic product from the alteration of magnetite and other iron-rich minerals. Found in various geological ages.
Uses & applications
Primary ore of iron for steel production; used as a pigment (ochre), in jewelry making (beads and cabochons), and as a polishing compound (jeweler's rouge).
Geological facts
The name comes from the Greek word for blood 'haima' because it leaves a reddish-brown streak. It is common on the surface of Mars, giving the planet its reddish hue.
Field identification & locations
Identify by its metallic luster and distinctive reddish-brown streak when rubbed on unglazed porcelain. It is heavy for its size and often found in banded iron formations or near hot springs.
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Other mineral specimens
Gneiss or Schist
Gneiss or Mica Schist with Garnet
Metamorphic
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Tumbled granite
Granite, a coarse-grained felsic intrusive igneous rock
igneous
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Pegmatite with Tourmaline and Quartz
Igneous Pegmatite
igneous
Granite
Granite (Phaneritic intrusive igneous rock)
igneous