Rock Identifier
Specular Hematite (Specularite) (Iron(III) oxide (Fe2O3)) — mineral
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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