sedimentary
River Pebble
Siliceous Rock / Quartzite
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, brown color, dull to vitreous luster, amorphous crystal structure, no cleavage, specific gravity around 2.65.
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Physical properties
Hardness of 7 on the Mohs scale, brown color, dull to vitreous luster, amorphous crystal structure, no cleavage, specific gravity around 2.65.
Formation & geological history
Formed through the mechanical weathering, transportation, and water-tumbling of various parent rocks in aquatic environments over thousands to millions of years.
Uses & applications
Used primarily in landscaping, garden decoration, pathways, and construction aggregate.
Geological facts
River pebbles are smoothed by the continuous abrasive action of water and other sediment, a process called attrition.
Field identification & locations
Found abundantly in and along riverbeds, stream banks, and lake shores worldwide; identified by smooth, rounded shapes.
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