mineral
Specular Hematite
Hematite (Fe2O3)
AI-generated identification · may be incorrectHardness 5.5-6.5 on Mohs scale. Metallic to splendent luster, dark metallic gray to black color, hexagonal/trigonal crystal structure, reddish-brown streak, uneven fracture.
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Physical properties
Hardness 5.5-6.5 on Mohs scale. Metallic to splendent luster, dark metallic gray to black color, hexagonal/trigonal crystal structure, reddish-brown streak, uneven fracture.
Formation & geological history
Formed in high-grade metamorphic rocks, hydrothermal veins, or banded iron formations (BIFs). The location near Minas Gerais, Brazil (approx. 20.1°S, 42.0°W) is world-famous for major hematite and iron ore deposits within the Iron Quadrangle (Quadrilátero Ferrífero).
Uses & applications
Major ore of iron, used in steel manufacturing, pigments, radiation shielding, cabochons, and as a popular collector's mineral specimen.
Geological facts
Specular hematite contains tiny mica-like flakes that sparkle brightly under light. Despite its metallic silver-black surface, scraping it against unglazed porcelain leaves a diagnostic reddish-brown streak.
Field identification & locations
Identify by high specific gravity (feels heavy for its size), metallic sparkle/reflection, and characteristic cherry-red to reddish-brown streak test. Very abundant in Minas Gerais, Brazil.
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