sedimentary
Generic Rock / River Pebble
Lithic fragment / Quartzite pebble
Hardness varies around 6-7 on Mohs scale depending on exact composition; color is gray to brownish-gray; luster is dull to vitreous; smooth, rounded texture due to water transport.
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Physical properties
Hardness varies around 6-7 on Mohs scale depending on exact composition; color is gray to brownish-gray; luster is dull to vitreous; smooth, rounded texture due to water transport.
Formation & geological history
Formed through the breakdown of parent rocks, followed by water transport and mechanical weathering (rounding) in a riverbed or beach environment over geological time.
Uses & applications
Used in landscaping, decorative gravel, construction aggregate, and occasionally as a tumbling or crafting medium.
Geological facts
Water-rounded stones like this are often called beach pebbles or river stones. Their smooth shape is the result of continuous abrasion against other rocks during transport by moving water.
Field identification & locations
Commonly found in streambeds, riverbanks, and coastal beaches worldwide. Useful for local geology studies and landscaping.
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