mineral
Specular Hematite (Polished Sphere)
Hematite (Alpha Fe2O3)
Hardness: 5.5–6.5 Mohs scale; Color: Metallic grey to black; Luster: Metallic; Crystal Structure: Trigonal; Cleavage: None; Specific Gravity: 5.26
- Hardness
- 5
- Color
- Metallic grey to black
- Luster
- Metallic
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Physical properties
Hardness: 5.5–6.5 Mohs scale; Color: Metallic grey to black; Luster: Metallic; Crystal Structure: Trigonal; Cleavage: None; Specific Gravity: 5.26
Formation & geological history
Formed in hydrothermal veins, as a result of volcanic activity, or in sedimentary environments as banded iron formations (BIFs) dating back billions of years.
Uses & applications
Primary ore of iron; also used in polishing compounds (jeweler's rouge), protective coatings, jewelry, and metaphysical collecting.
Geological facts
Hematite is known as the 'blood stone' because its streak and powdered form are blood-red, even though the crystal looks black or silver. It is responsible for the red color of Mars' surface.
Field identification & locations
Identify by its high density (feels heavy for its size) and by performing a streak test on unglazed porcelain, which will leave a distinct reddish-brown mark. Commonly found in Brazil, Australia, and the Lake Superior region.
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