sedimentary

Sandstone

Sandstone (Arenite)

Hardness varies (typically 6-7 if quartz-rich), tan to reddish-brown color, dull to earthy luster, composed of sand-sized grains, granular texture.

Identified August 18, 2026More sedimentary →

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

Physical properties

Hardness varies (typically 6-7 if quartz-rich), tan to reddish-brown color, dull to earthy luster, composed of sand-sized grains, granular texture.

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

Commonly used in construction, landscaping, and as a decorative stone. Historically used for tools like grindstones.

Sandstone is one of the most common types of sedimentary rock and often contains fossils. The reddish color is typically due to iron oxide.

Identified by its gritty, sandpaper-like texture 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)

Generic Pebble / Rock Fragment

Lithic fragment / Weathered rock

Sedimentary Sandstone

Arenite (Sedimentary Rock)

Shale (or Mudstone/Siltstone)

Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)