mineral
Tumbled Hematite
Iron(III) oxide (Fe2O3)
AI-generated identification · may be incorrectHardness: 5.5-6.5 on Mohs scale. Color: Metallic gray to black (streak is cherry red). Luster: Metallic to sub-metallic. Crystal structure: Trigonal/Hexagonal. Specific gravity: 5.26.
- Hardness
- 5
- Color
- Metallic gray to black (streak is cherry red)
- Luster
- Metallic to sub-metallic
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Physical properties
Hardness: 5.5-6.5 on Mohs scale. Color: Metallic gray to black (streak is cherry red). Luster: Metallic to sub-metallic. Crystal structure: Trigonal/Hexagonal. Specific gravity: 5.26.
Formation & geological history
Formed primarily in sedimentary environments as a result of iron precipitation in marine and fresh water. It can also form as a sublimation product from volcanic activities or in hydrothermal veins.
Uses & applications
Primary ore of iron for steel production. In its polished form, it is used for jewelry, beads, and as a 'worry stone' in metaphysical practices. Also used as a pigment (red ochre).
Geological facts
Hematite is known for having a reddish streak regardless of its external metallic gray appearance. It was used by ancient civilizations for cave paintings and is a major component of 'banded iron formations'.
Field identification & locations
Identified by its high density (feels heavy for its size) and its characteristic reddish-brown streak when rubbed against an unglazed porcelain plate. Commonly found in Brazil, Australia, and the Lake Superior region of North America.
