mineral

Possible hematite-bearing pebble

Hematite, Fe₂O₃, possibly mixed with magnetite or iron-rich matrix

AI-generated identification · may be incorrect

Small rounded, dark gray-to-black specimen with metallic to submetallic luster and visible granular/striated texture. Hematite hardness is 5–6.5 Mohs, typically with no prominent cleavage and a reddish-brown streak; exact properties require testing.

Identified August 21, 2026More mineral →

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Physical properties

Formation & geological history

Likely formed by oxidation or hydrothermal alteration of iron-rich rocks, commonly in banded iron formations or veins. Such deposits range from Precambrian to much younger ages.

Uses & applications

Iron ore and pigment; attractive polished pieces are collected, though this small specimen has little commercial value.

Geological facts

Hematite can appear metallic gray (“specular hematite”) or earthy red. A streak test producing red-brown powder is more diagnostic than appearance alone.

Field identification & locations

Commonly found in Brazil, Australia, China, India, and the Lake Superior region of the United States. Test streak on unglazed porcelain and compare magnetism: strong attraction suggests magnetite or a mixture.