mineral
Hematite Pebble
Hematite (Alpha Fe2O3)
AI-generated identification · may be incorrectHardness: 5.5-6.5; Color: Reddish-brown to black; Luster: Metallic to earthy; Structure: Hexagonal; Specific Gravity: 5.26; Red streak
- Hardness
- 5
- Color
- Reddish-brown to black
- Luster
- Metallic to earthy
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Physical properties
Hardness: 5.5-6.5; Color: Reddish-brown to black; Luster: Metallic to earthy; Structure: Hexagonal; Specific Gravity: 5.26; Red streak
Formation & geological history
Formed through hydrothermal processes or sedimentary precipitation in iron-rich waters, often shaped into smooth pebbles by water erosion in rivers or coastal areas.
Uses & applications
Main ore of iron; used as a weight, for polishing (jeweler's rouge), and frequently as a pocket stone or in bead jewelry.
Geological facts
The name comes from the Greek word for blood, 'haima', because of its red color when powdered. It is common on Mars, giving the 'Red Planet' its hue.
Field identification & locations
Identify by its heavy weight relative to size and the characteristic rust-red streak it leaves on unglazed porcelain. Commonly found in iron mines and beach gravels.
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