mineral
Hematite-rich ironstone
Hematite (α-Fe₂O₃), likely in a limonitic or ironstone matrix
AI-generated identification · may be incorrectReddish-brown, rough, metallic to earthy luster; hematite is Mohs 5–6.5, trigonal, and lacks prominent cleavage. A red-brown streak is a useful test; the image alone cannot confirm the exact composition.
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Physical properties
Reddish-brown, rough, metallic to earthy luster; hematite is Mohs 5–6.5, trigonal, and lacks prominent cleavage. A red-brown streak is a useful test; the image alone cannot confirm the exact composition.
Formation & geological history
Forms through oxidation and precipitation of iron in soils, sedimentary deposits, or hydrothermal settings; specimens may be very old, but age cannot be determined visually.
Uses & applications
Iron ore when sufficiently concentrated; attractive pieces are collected, and polished hematite is used for beads and ornaments.
Geological facts
Hematite’s name comes from Greek for “blood,” referring to its characteristic red streak and powder.
Field identification & locations
The dark, rusty-red appearance is consistent with iron oxides, but a streak test and specific-gravity or mineral analysis help distinguish hematite from other iron minerals. Common in iron formations and weathered iron-rich rocks worldwide.
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