sedimentary
River Pebble
Quartzo-feldspathic rock fragment
AI-generated identification · may be incorrectHardness varies from 6 to 7 on the Mohs scale depending on mineral content; color ranges from tan, yellowish, to grey; luster is dull to vitreous; smooth, water-worn, rounded texture.
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Physical properties
Hardness varies from 6 to 7 on the Mohs scale depending on mineral content; color ranges from tan, yellowish, to grey; luster is dull to vitreous; smooth, water-worn, rounded texture.
Formation & geological history
Formed through the continuous mechanical weathering, erosion, and transport of parent rocks (such as granite, quartzite, or sandstone) along riverbeds and streams over thousands to millions of years.
Uses & applications
Commonly used in landscaping, gardening, decorative stone pathways, and general construction aggregates.
Geological facts
The smooth, rounded shape of a river pebble is caused by abrasion as it is tumbled and rolled along the streambed by water currents, colliding with other rocks.
Field identification & locations
Found abundantly in riverbeds, lake shores, and ancient alluvial deposits worldwide. Identified by its rounded, water-worn shape and smooth exterior.
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