mineral
Hematite
Hematite (Fe2O3)
Hardness of 5.5 to 6.5 on the Mohs scale, color ranges from metallic gray and silver to reddish-brown, luster is metallic to submetallic or earthy, crystal system is rhombohedral, specific gravity is approximately 5.3.
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Physical properties
Hardness of 5.5 to 6.5 on the Mohs scale, color ranges from metallic gray and silver to reddish-brown, luster is metallic to submetallic or earthy, crystal system is rhombohedral, specific gravity is approximately 5.3.
Formation & geological history
Forms in a variety of geological environments including hydrothermal veins, sedimentary deposition in marine or lake settings (such as banded iron formations), and as volcanic sublimation products.
Uses & applications
Primary ore of iron and steel production, used in pigments, radiation shielding, heavy media separation, and sometimes carved into jewelry or ornamental objects.
Geological facts
Hematite leaves a distinctive reddish-brown streak on an unglazed porcelain streak plate, a definitive diagnostic property even when the mineral sample appears dark gray or metallic.
Field identification & locations
Easily identified by its characteristic reddish-brown streak, metallic to earthy luster, and high density. Commonly found worldwide, notably in the Lake Superior region of North America, Brazil, and Australia.
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