sedimentary
Rounded pebble, likely fine-grained river stone
Unidentified lithic pebble; composition cannot be determined from the image
AI-generated identification · may be incorrectSmooth, rounded, gray-brown and dull; likely a fine-grained rock. Hardness, mineral composition, and crystal structure cannot be reliably assessed visually.
Identified More sedimentary →
Explore Rounded pebble, likely fine-grained river stone in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Smooth, rounded, gray-brown and dull; likely a fine-grained rock. Hardness, mineral composition, and crystal structure cannot be reliably assessed visually.
Formation & geological history
Likely formed as part of a larger rock, then rounded by abrasion during transport in water or by other sediment. Its geological age and original formation environment are unknown.
Uses & applications
Primarily a natural collectible or decorative pebble; no specific industrial use can be identified.
Geological facts
Its smooth shape is consistent with prolonged abrasion, but many rock types can weather into similar pebbles.
Field identification & locations
Examine a fresh surface and test hardness or streak to distinguish likely compositions; the photograph alone does not support a precise identification or locality.
More like this
Other sedimentary specimens
Fossiliferous Sedimentary Rock
Sedimentary limestone with invertebrate fossil imprint
fossil
Sandstone or Siltstone
Arenite (if sandstone)
Sedimentary
Sandstone
Arenite
sedimentary
Quartz pebble
Silicon dioxide (SiO2)
sedimentary
Shale
Shale (clastic sedimentary rock)
sedimentary
Shale (or Mudstone/Siltstone)
Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
sedimentary