sedimentary
Rounded river pebble, likely quartz-rich stone
Unidentified lithic clast; exact mineralogy cannot be determined from the image
AI-generated identification · may be incorrectBrown-gray, rounded, weathered surface with a small reflective spot; likely hardness around 6–7 if quartz-rich. No distinct crystal structure or cleavage is visible.
Identified More sedimentary →
Explore Rounded river pebble, likely quartz-rich stone in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Brown-gray, rounded, weathered surface with a small reflective spot; likely hardness around 6–7 if quartz-rich. No distinct crystal structure or cleavage is visible.
Formation & geological history
Likely weathered from a larger rock and rounded by transport in a stream or on a beach; its source rock and age are indeterminate from appearance alone.
Uses & applications
Primarily a natural collectible or decorative pebble; no specific industrial or jewelry use can be inferred.
Geological facts
The rounded shape and smooth edges suggest abrasion during transport, while the glossy patch may be a wet surface or a reflective mineral grain.
Field identification & locations
A pebble’s identity is best narrowed down using a fresh, unweathered surface, hardness, streak, and acid reaction; this specimen’s exact locality is unknown.
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