sedimentary
River Pebble
Polished Quartzite or Mixed Lithology
Hardness varies around 6-7 on the Mohs scale, smooth texture, rounded shape, variable colors including gray, brown, and blue, vitreous to dull luster.
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Physical properties
Hardness varies around 6-7 on the Mohs scale, smooth texture, rounded shape, variable colors including gray, brown, and blue, vitreous to dull luster.
Formation & geological history
Formed through the mechanical weathering, transportation, and water-tumbling erosion of various parent rocks in riverbeds over thousands to millions of years.
Uses & applications
Used in landscaping, gardening, decorative purposes, and sometimes in construction aggregate.
Geological facts
The smoothing process is known as rounding, where sharp edges of a rock fragment are worn down by abrasion as it is transported by moving water.
Field identification & locations
Easily identified by its smooth, water-worn surface and rounded shape, commonly found along riverbanks, beaches, and dry streambeds worldwide.
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Arenite (if sandstone)
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Generic Pebble / Rock Fragment
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Banded Siltstone / Mudstone Pebble
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