sedimentary

Sandstone

Arenite

Hardness 6-7, tan/orange/brown/red color, dull earthy luster, clastic texture (sand-sized grains), often composed mainly of quartz or feldspar.

Identified August 31, 2026More sedimentary →

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Physical properties

Hardness 6-7, tan/orange/brown/red color, dull earthy luster, clastic texture (sand-sized grains), often composed mainly of quartz or feldspar.

Formed by the compaction and cementation of sand grains over millions of years, typically in environments like beaches, deserts, or riverbeds.

Used historically as a building material, for paving, and as an aquifer.

Sandstone is one of the most common types of sedimentary rock and can hold large amounts of water or oil due to its porosity.

Identified by its gritty feel (like sandpaper) and visible sand grains. Found worldwide in sedimentary basins.

Fossiliferous Sedimentary Rock

Sedimentary limestone with invertebrate fossil imprint

Sandstone or Siltstone

Arenite (if sandstone)

Quartz pebble

Silicon dioxide (SiO2)

Sedimentary Sandstone

Arenite (Sedimentary Rock)

Generic Pebble / Rock Fragment

Lithic fragment / Weathered rock

Shale (or Mudstone/Siltstone)

Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)