mineral

Small dark metallic-looking mineral grain, possibly magnetite

Magnetite (Fe₃O₄), tentative identification

AI-generated identification · may be incorrect

Opaque, dark gray to black with a metallic-to-submetallic luster; magnetite has Mohs hardness 5.5–6.5, cubic crystal structure, and no distinct cleavage. The image is too limited for reliable identification; a magnetic test would help distinguish it.

Identified October 10, 2026More mineral →

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Physical properties

Formation & geological history

If magnetite, it formed in igneous or metamorphic rocks, or accumulated in sedimentary heavy-mineral deposits; its age depends on the host deposit.

Uses & applications

Magnetite is an important iron ore and is also collected as a mineral specimen.

Geological facts

Magnetite is strongly magnetic and commonly occurs as octahedral crystals or rounded grains.

Field identification & locations

Look for a black streak and strong attraction to a magnet; common sources include iron-rich igneous rocks and placer sands worldwide. The tiny, partly obscured specimen cannot be confirmed from appearance alone.