sedimentary
Common River Pebbles and Stones
Mixed natural stream gravel / siliciclastic pebbles
AI-generated identification · may be incorrectHardness varies from 3 to 7 on Mohs scale depending on mineral components (mostly quartz and feldspar). Colors range from light beige, brown, and grey. Luster is dull to earthy, texture is sub-angular to rounded.
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Physical properties
Hardness varies from 3 to 7 on Mohs scale depending on mineral components (mostly quartz and feldspar). Colors range from light beige, brown, and grey. Luster is dull to earthy, texture is sub-angular to rounded.
Formation & geological history
Formed through natural weathering and erosion of parent rocks. These pebbles are rounded and smoothed over time by the mechanical action of flowing water in rivers, streams, or lake shores.
Uses & applications
Commonly used for decoration, landscaping, craft projects, aquarium gravel, and construction aggregates.
Geological facts
River pebbles undergo natural abrasion for thousands to millions of years, wearing away sharp edges and leaving only the harder, more durable mineral components intact.
Field identification & locations
Can be identified by their smooth, water-worn edges and rounded shape. Found abundantly along riverbeds, beaches, and stream channels worldwide.
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