mineral
Tumbled hematite (speculative identification)
Hematite, α-Fe₂O₃
AI-generated identification · may be incorrectSmooth, polished, metallic-looking dark gray-brown surface; hematite has Mohs hardness 5–6.5, trigonal crystal structure, and specific gravity around 5.3; the image alone cannot confirm the material.
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Physical properties
Smooth, polished, metallic-looking dark gray-brown surface; hematite has Mohs hardness 5–6.5, trigonal crystal structure, and specific gravity around 5.3; the image alone cannot confirm the material.
Formation & geological history
Hematite forms through oxidation and other geological processes in iron-rich rocks and sediments, ranging from ancient deposits to modern formations.
Uses & applications
Commonly polished for jewelry, beads, and collectibles; also an important iron ore and pigment source.
Geological facts
Despite its metallic appearance, hematite typically produces a reddish-brown streak—a useful identification test on unglazed porcelain.
Field identification & locations
The rounded, reflective object could be a tumbled stone, but its identity is uncertain from the photo; verify with streak, heft, and mineral tests. Hematite occurs worldwide, including major deposits in Brazil, Australia, and the United States.
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