mineral
Hematite
Iron(III) oxide, Fe2O3
AI-generated identification · may be incorrectHardness: 5.5-6.5. Color: Steel gray to black. Luster: Metallic. Crystal structure: Trigonal. High specific gravity.
- Hardness
- 5
- Color
- Steel gray to black
- Luster
- Metallic
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Physical properties
Hardness: 5.5-6.5. Color: Steel gray to black. Luster: Metallic. Crystal structure: Trigonal. High specific gravity.
Formation & geological history
Forms in varied geological environments, often as a primary mineral in sedimentary banded iron formations or as a secondary weathering product.
Uses & applications
Primary ore of iron; also used in jewelry (often tumbled or carved) and as a pigment.
Geological facts
Hematite derives its name from the Greek word for blood, due to its red streak. Some 'magnetic hematite' sold in stores is actually a synthetic material called hematine.
Field identification & locations
Identified by its distinctive cherry-red to reddish-brown streak on a streak plate, regardless of its external color. It is noticeably dense for its size.
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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
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
Septarian Pebble
Septarian nodule / Concretion
sedimentary