sedimentary

Sandstone

Sedimentary Clastic Rock

Hardness of 6-7 on Mohs scale depending on cementation, brown to tan color, dull earthy luster, clastic texture composed mostly of quartz grains.

Identified November 11, 2026More sedimentary →

Get a report just like this from any photo, free.

Physical properties

Hardness of 6-7 on Mohs scale depending on cementation, brown to tan color, dull earthy luster, clastic texture composed mostly of quartz grains.

Formed by the accumulation, compaction, and cementation of mineral particles or rock fragments, primarily quartz, over millions of years.

Commonly used in construction, paving, as dimension stone, and in the manufacture of glass.

Sandstone often preserves ancient ripple marks and fossil tracks, providing clues to prehistoric environments.

Identified by its gritty texture like sandpaper and visible sand grains; found worldwide in deserts, riverbeds, and ancient sea margins.

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

Fossiliferous Sedimentary Rock

Sedimentary limestone with invertebrate fossil imprint

Sandstone or Siltstone

Arenite (if sandstone)

Sandstone

Arenite

Shale

Shale (clastic sedimentary rock)

Shale (or Mudstone/Siltstone)

Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)