sedimentary
Mixed Pebbles
Polylithic Rock Fragments
AI-generated identification · may be incorrectHardness varies from 3 to 7 on the Mohs scale depending on the mineral content. Colors include white, black, grey, and brown with vitreous to dull lusters.
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Physical properties
Hardness varies from 3 to 7 on the Mohs scale depending on the mineral content. Colors include white, black, grey, and brown with vitreous to dull lusters.
Formation & geological history
Formed through the mechanical weathering, erosion, and transport of various parent rocks by water or ice, smoothing them into rounded pebbles.
Uses & applications
Used in landscaping, decorative ground cover, and aquarium substrates.
Geological facts
Pebbles are classified by size on the Wentworth scale, ranging from 4 to 64 millimeters in diameter. Water tumbling rounds their edges over long distances.
Field identification & locations
Found abundantly in riverbeds, lake shores, and beaches globally; identified by smooth, rounded contours shaped by fluid dynamics.
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