mineral

Tumbled hematite (likely hematite-rich iron oxide)

Hematite, Fe₂O₃; possibly mixed with magnetite, Fe₃O₄

AI-generated identification · may be incorrect

Small polished/tumbled, metallic-to-submetallic dark gray-black pieces with a smooth reflective luster. Hematite has Mohs hardness 5–6.5, no prominent cleavage, trigonal crystal structure, and a diagnostic red-brown streak; magnetite is harder (5.5–6.5) and strongly magnetic.

Identified September 19, 2026More mineral →

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Physical properties

Formation & geological history

Iron oxides formed through hydrothermal, sedimentary, or weathering processes, commonly from Precambrian banded iron formations and younger ore deposits. This specimen has been human-shaped and polished.

Uses & applications

Used as iron ore, pigment, and ornamental material; polished beads and cabochons are common. Common commercial specimens are inexpensive.

Geological facts

Hematite’s name derives from the Greek for “blood,” referring to its red streak or powder. A magnet test helps distinguish magnetite-rich material from ordinary hematite.

Field identification & locations

Commonly found in Brazil, Australia, China, India, and the Lake Superior region of North America. Test an inconspicuous area for a reddish streak and check magnetic response; the image alone cannot confirm the identification.