sedimentary
River Pebble
Siliceous / Quartzite Lithology
AI-generated identification · may be incorrectHardness typically 7 on Mohs scale; smooth, rounded texture; varied gray, brown, or multi-color; vitreous to dull luster.
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Physical properties
Hardness typically 7 on Mohs scale; smooth, rounded texture; varied gray, brown, or multi-color; vitreous to dull luster.
Formation & geological history
Formed through the physical weathering, transport, and water-erosion of parent rocks in riverbeds over thousands to millions of years.
Uses & applications
Used primarily in landscaping, garden decoration, aquarium substrates, and walkway construction.
Geological facts
Water tumbling continuously rounds sharp edges through constant friction with other sediment and the riverbed.
Field identification & locations
Found abundantly in and along freshwater streams, rivers, and beaches worldwide. Identified by its smooth, water-worn shape.
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