sedimentary
Rounded pebble, likely quartz-rich river or beach pebble
Unidentified lithic clast; possibly quartzite or iron-stained quartz-rich rock
AI-generated identification · may be incorrectSmall, rounded, weathered pebble with a mottled tan, gray, and rusty-brown surface and dull to slightly granular luster. Hardness and crystal structure cannot be reliably determined from the image; quartz-rich material would be about Mohs 7.
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Physical properties
Small, rounded, weathered pebble with a mottled tan, gray, and rusty-brown surface and dull to slightly granular luster. Hardness and crystal structure cannot be reliably determined from the image; quartz-rich material would be about Mohs 7.
Formation & geological history
Likely a fragment of older rock rounded by abrasion during transport in water or sediment. Its age and exact formation environment cannot be identified from appearance alone.
Uses & applications
Primarily a natural collectible or decorative pebble; no specific industrial use is apparent at this size.
Geological facts
Rusty patches commonly result from iron-oxide staining, while the rounded shape records abrasion during transport.
Field identification & locations
A rounded outline and worn surface suggest water or sediment transport, but identifying the rock requires examining a fresh surface, grain texture, and hardness. Similar pebbles occur in streambeds, beaches, and glacial deposits.
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