sedimentary
Pebble
Lithic fragment
AI-generated identification · may be incorrectHardness varies by mineral content, typically 6-7 on Mohs scale. Colors range from gray to brown with dull to sub-waxy luster.
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Physical properties
Hardness varies by mineral content, typically 6-7 on Mohs scale. Colors range from gray to brown with dull to sub-waxy luster.
Formation & geological history
Formed through the natural weathering, erosion, and water-transport rounding of larger rock masses over extended geological timescales.
Uses & applications
Used in landscaping, construction aggregate, and pathway paving.
Geological facts
Pebbles are officially classified by their grain size, specifically ranging from 4 to 64 millimeters in diameter according to the Krumbein scale.
Field identification & locations
Found abundantly in riverbeds, beaches, and glacial till; identifiable by its smooth, water-worn rounded shape.
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