sedimentary
Sandstone Concretion / Sandstone Pebble
Arenite / Quartz Sandstone
AI-generated identification · may be incorrectHardness 6-7 on Mohs scale (quartz grains); earthy to dull luster; tan to light brown color with visible sandy, granular texture.
Identified More sedimentary →
Explore Sandstone Concretion / Sandstone Pebble in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness 6-7 on Mohs scale (quartz grains); earthy to dull luster; tan to light brown color with visible sandy, granular texture.
Formation & geological history
Formed through the compaction and cementation of mineral particles or rock fragments, typically predominantly quartz sand deposited in deserts, rivers, or beaches.
Uses & applications
Widely quarried as building stone, pavers, and crushed aggregate; rounded specimens serve in landscaping.
Geological facts
Sandstone acts as one of Earth's most critical underground reservoirs, storing vast amounts of groundwater and hydrocarbons.
Field identification & locations
Identified by its rough, sandpaper-like gritty feel and clearly visible cemented grains; commonly found in sedimentary basins and riverbeds worldwide.
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