mineral

Hematite (Specularite)

Fe2O3 (Iron(III) oxide)

AI-generated identification · may be incorrect

Hardness: 5.5-6.5 on Mohs scale. Color: Metallic gray to silver-black with reddish undertones. Luster: Metallic to sub-metallic. Crystal Structure: Hexagonal (trigonal). Streak: Reddish-brown (key diagnostic feature). Specific Gravity: ~5.26.

Hardness: 5
Color: Metallic gray to silver-black with reddish undertones
Luster: Metallic to sub-metallic

Identified July 26, 2026More mineral →

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Physical properties

Formation & geological history

Forms in hydrothermal veins, metamorphic rocks, sedimentary iron formations (Banded Iron Formations), and as an alteration product of other iron minerals. The region (Minas Gerais, Brazil) is famous for rich pre-Cambrian iron ore deposits.

Uses & applications

Primary ore of iron and steel production, heavy media separation, radiation shielding, pigment production, lapidary/jewelry, and as a popular mineral specimen for collectors.

Geological facts

Specular hematite (or specularite) exhibits a glittering, micaceous metallic luster due to tiny flaky crystals. Minas Gerais, Brazil (where this regional coordinate points) is one of the world's premier hematite and iron ore producing regions, famous for high-grade specular iron ore.

Field identification & locations

Can be confirmed in the field by performing a streak test on unglazed porcelain, which produces a characteristic rusty red-brown streak despite the shiny metallic surface color. Highly magnetic varieties (hematite with magnetite inclusions) are also common in this region.