mineral
Likely iron-stained quartz or quartz-rich pebble
Quartz (SiO₂), possibly colored by iron-oxide coatings
AI-generated identification · may be incorrectOpaque, rounded, ochre-orange to brown surface with a dull to slightly waxy luster; quartz has Mohs hardness 7, a trigonal crystal structure, and no cleavage. The image does not show enough detail to confirm composition or specific gravity.
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Physical properties
Opaque, rounded, ochre-orange to brown surface with a dull to slightly waxy luster; quartz has Mohs hardness 7, a trigonal crystal structure, and no cleavage. The image does not show enough detail to confirm composition or specific gravity.
Formation & geological history
A natural pebble may have been rounded by stream or beach transport; its iron staining formed through oxidation of iron-bearing minerals. Its geological age cannot be determined from the photograph.
Uses & applications
Quartz-rich material is common in construction aggregate and decorative stone; this small specimen has mainly educational or modest collecting value.
Geological facts
Iron oxides such as goethite or hematite can impart yellow, orange, and brown colors to otherwise pale quartz.
Field identification & locations
Check for a glassy interior, hardness sufficient to scratch ordinary glass, and conchoidal fracture; these support quartz identification. Similar pebbles occur widely in river and beach gravels.
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