mineral

Likely hematite-rich iron ore

Hematite, Fe₂O₃, possibly mixed with magnetite or other iron oxides

AI-generated identification · may be incorrect

Dark steel-gray to black, strongly metallic-to-submetallic glitter, massive and granular with no obvious crystals; hematite hardness 5–6.5 Mohs, specific gravity about 5.0–5.3, and a red-brown streak. The image alone cannot confirm mineral identity.

Identified August 19, 2026More mineral →

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Physical properties

Formation & geological history

Forms through oxidation of iron-rich rocks, hydrothermal processes, or sedimentary chemical precipitation; deposits range from ancient Precambrian banded iron formations to younger hydrothermal and weathering zones.

Uses & applications

Used as iron ore, pigment, polishing powder, and a collectible mineral; hematite jewelry is commonly polished, though this specimen appears rough.

Geological facts

A diagnostic test is streak: hematite leaves red to reddish-brown powder, while magnetite leaves a black streak and is strongly magnetic. Metallic sparkle can also occur in specular hematite.

Field identification & locations

Common localities include Brazil, Australia, South Africa, India, and the Lake Superior region. Test magnetism, streak on unglazed porcelain, and density; avoid relying on appearance because slag and graphite can look similar.