sedimentary
River Stone (River Pebbles)
Alluvial Deposit (typically Quartzite, Sandstone, or Granite clasts)
AI-generated identification · may be incorrectHardness: 6-7 (Mohs); Color: Tan, brown, grey, and ochre; Luster: Dull to waxy; Texture: Smooth, rounded, water-worn; SG: ~2.65
- Hardness
- 6-7 (Mohs)
- Color
- Tan, brown, grey, and ochre
- Luster
- Dull to waxy
Identified More sedimentary →
Explore River Stone (River Pebbles) in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness: 6-7 (Mohs); Color: Tan, brown, grey, and ochre; Luster: Dull to waxy; Texture: Smooth, rounded, water-worn; SG: ~2.65
Formation & geological history
Formed through the erosion of larger rock formations, transported by water over long periods where abrasive action smooths the edges. Age ranges from thousands to millions of years depending on the parent material.
Uses & applications
Landscaping, decorative gardening, construction aggregate, drainage systems, and walkway paving.
Geological facts
The smooth, rounded shape is a result of fluvial abrasion, a process where rocks collide and grind against each other in moving water environments. Large deposits are often found in ancient riverbeds.
Field identification & locations
Identify by the distinct rounded edges and variety of colors in a single deposit. Frequently found in stream beds, floodplains, and glacial outwash plains.
More like this
Other sedimentary specimens
Fossil-bearing concretion, possibly containing a fossil shell or other organic inclusion
Calcareous concretion; exact fossil and host-rock composition are not identifiable from the image
fossil
Fossiliferous Sedimentary Rock
Sedimentary limestone with invertebrate fossil imprint
fossil
Sandstone or Siltstone
Arenite (if sandstone)
Sedimentary
Sandstone
Arenite
sedimentary
Shale
Shale (clastic sedimentary rock)
sedimentary
Shale (or Mudstone/Siltstone)
Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
sedimentary