mineral
Small iron-rich pebble, possibly hematite or ironstone
Indeterminate from the image; possible hematite (α‑Fe₂O₃) or goethite (α‑FeO(OH))
AI-generated identification · may be incorrectDark reddish-brown, rounded, and apparently opaque with a dull surface. Hardness and crystal structure cannot be determined from the photograph; hematite is Mohs 5–6.5, while goethite is about 5–5.5.
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Physical properties
Dark reddish-brown, rounded, and apparently opaque with a dull surface. Hardness and crystal structure cannot be determined from the photograph; hematite is Mohs 5–6.5, while goethite is about 5–5.5.
Formation & geological history
Iron oxides and hydroxides commonly form through weathering or precipitation in iron-rich soils and sediments; the specimen’s age and setting are unknown.
Uses & applications
Iron-rich material is used as iron ore and pigment; this tiny, unidentified piece has no clear commercial value and is mainly a curiosity or teaching specimen.
Geological facts
A reddish-brown streak on unglazed porcelain can help distinguish iron oxides; hematite typically leaves a red-brown streak.
Field identification & locations
The image is insufficient for a reliable identification. Check streak, hardness, density, and whether it attracts a magnet; small ironstone or oxide pebbles are widespread in soils and stream gravels.
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