mineral
Specular Hematite (Specularite)
Iron(III) oxide (Fe2O3)
Hardness: 5.5–6.5; Color: Steel-gray to black with a sparkling metallic luster; Crystal structure: Trigonal; Streak: Reddish-brown; Cleavage: None/Indistinct; Specific Gravity: 5.26.
- Hardness
- 5
- Color
- Steel-gray to black with a sparkling metallic luster
- Streak
- Reddish-brown
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Physical properties
Hardness: 5.5–6.5; Color: Steel-gray to black with a sparkling metallic luster; Crystal structure: Trigonal; Streak: Reddish-brown; Cleavage: None/Indistinct; Specific Gravity: 5.26.
Formation & geological history
Formed as a secondary mineral through hydrothermal processes, sublimation, or in sedimentary environments that are oxygen-rich. It often occurs in metamorphic rocks as a result of regional metamorphism of iron ores.
Uses & applications
Primary ore of iron for steel manufacturing; used in heavy media separation; as a polishing compound (jeweler's rouge); and occasionally for ornamental or metaphysical jewelry.
Geological facts
The name hematite is derived from the Greek word 'haima' (blood), because of its red streak. Specularite is specifically the name given to hematite that forms micaceous or sparkling crystalline flakes.
Field identification & locations
Identify by its sparkling metallic 'glitter' and the characteristic reddish-brown streak it leaves on an unglazed porcelain plate. Found commonly in Lake Superior (USA), Brazil, and Russia.
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