mineral

Small iron-rich rock fragment (possibly hematite or limonite)

Likely iron oxides/hydroxides: hematite (Fe₂O₃) and/or goethite–limonite; identification is uncertain from the image

AI-generated identification · may be incorrect

Reddish-brown, rough, and mottled, with an earthy to dull luster and no visible crystal structure. Hardness and specific gravity cannot be determined reliably from the photograph.

Identified October 7, 2026More mineral →

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Physical properties

Reddish-brown, rough, and mottled, with an earthy to dull luster and no visible crystal structure. Hardness and specific gravity cannot be determined reliably from the photograph.

Formation & geological history

Iron oxides form through oxidation and weathering of iron-bearing minerals, or in sedimentary iron deposits; the specimen’s age and specific formation are unknown.

Uses & applications

Iron ores are used to produce steel and pigments; this small fragment has little apparent commercial or jewelry value.

Geological facts

Hematite commonly leaves a reddish-brown streak, while goethite-rich material may appear yellow-brown to dark brown.

Field identification & locations

A streak test on unglazed porcelain and a hardness test can help distinguish iron oxides, but the image alone cannot confirm the identification. Iron-oxide minerals occur worldwide, especially in soils and weathered rocks.