sedimentary
Pebble
Lithic fragment / Quartzite pebble
AI-generated identification · may be incorrectHardness varies from 6 to 7 on the Mohs scale depending on mineral content. Typically displays rounded shapes due to water transport, with a dull to vitreous luster.
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Physical properties
Hardness varies from 6 to 7 on the Mohs scale depending on mineral content. Typically displays rounded shapes due to water transport, with a dull to vitreous luster.
Formation & geological history
Formed through the mechanical weathering and erosion of larger rock masses, followed by transportation and rounding in riverbeds or coastal environments.
Uses & applications
Used in landscaping, decorative garden paths, construction aggregate, and as specimens for amateur rockhound collections.
Geological facts
Pebbles are officially classified by their grain size, ranging from 4 to 64 millimeters in diameter on the Wentworth scale. Their smooth surfaces are the result of abrasion during fluvial transport.
Field identification & locations
Identified by its water-worn, rounded shape and smooth texture. Commonly found in riverbeds, beaches, and glacial outwash plains worldwide.
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