mineral
Likely polished hematite
Hematite, α-Fe₂O₃ (identification is tentative from the photo)
AI-generated identification · may be incorrectSmall, polished, dark gray-to-brown piece with a reflective surface. Hematite has Mohs hardness 5–6.5, a trigonal crystal structure, and a distinctive reddish-brown streak; the image alone cannot confirm these traits.
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Physical properties
Small, polished, dark gray-to-brown piece with a reflective surface. Hematite has Mohs hardness 5–6.5, a trigonal crystal structure, and a distinctive reddish-brown streak; the image alone cannot confirm these traits.
Formation & geological history
Hematite forms in many settings, including iron-rich sediments, hydrothermal veins, and weathered iron deposits; specimens range from Precambrian to recent. The pictured piece appears shaped and polished from natural material.
Uses & applications
Commonly used as an iron ore and fashioned into beads, carvings, and decorative objects.
Geological facts
Despite its metallic appearance, hematite is not magnetic in its common form and typically leaves a red-brown streak.
Field identification & locations
Check for a reddish-brown streak on unglazed porcelain and a relatively high heft; dark polished stones can resemble other minerals. Hematite occurs worldwide, including Brazil, Australia, and the Lake Superior region.
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