
mineral
Specular hematite (micaceous hematite)
Hematite, iron(III) oxide (Fe₂O₃), likely with minor quartz or iron oxides
AI-generated identification · may be incorrectMetallic silver-gray, platy and sparkly with uneven crystalline aggregates; Mohs hardness 5–6.5, high specific gravity (~5.3), opaque, with no prominent cleavage in massive pieces; streak is reddish-brown to red.
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Physical properties
Metallic silver-gray, platy and sparkly with uneven crystalline aggregates; Mohs hardness 5–6.5, high specific gravity (~5.3), opaque, with no prominent cleavage in massive pieces; streak is reddish-brown to red.
Formation & geological history
Forms in hydrothermal veins, banded iron formations, and oxidation zones where iron-bearing fluids precipitate hematite. Deposits range from Precambrian formations to younger hydrothermal systems.
Uses & applications
Used as an iron ore, pigment, polishing powder, and ornamental mineral; attractive specular specimens are collected but are generally not used as gemstones.
Geological facts
The glitter comes from reflective hematite plates rather than true metallic flakes. Hematite is weakly magnetic or nonmagnetic, while associated magnetite may produce a stronger response.
Field identification & locations
Common localities include Brazil, Morocco, China, the United States, and Switzerland. Confirm with a reddish-brown streak and unusually heavy feel; the specimen appears consistent with a rough, silver-gray specular hematite piece.
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