sedimentary

Sandstone

Arenite (composed primarily of SiO2)

AI-generated identification · may be incorrect

Hardness: 6-7 on Mohs scale; Color: typically grey, tan, or reddish; Luster: dull/earthy; Crystal structure: granular/clastic; Cleavage: none; Specific gravity: 2.2–2.8

Hardness: 6-7 on Mohs scale
Color: typically grey, tan, or reddish
Luster: dull/earthy

Identified March 14, 2026More sedimentary →

Explore Sandstone in the encyclopedia →

Identify your own rocks.

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

App Store Google Play

Physical properties

Hardness: 6-7 on Mohs scale; Color: typically grey, tan, or reddish; Luster: dull/earthy; Crystal structure: granular/clastic; Cleavage: none; Specific gravity: 2.2–2.8

Formation & geological history

Formed from the accumulation and cementation of sand-sized mineral grains or rock fragments (usually quartz or feldspar) over millions of years in deserts, riverbeds, or ocean floors.

Uses & applications

Widely used as a construction material (flagstone), in glass manufacturing (if high silica), for making grindstones, and as a popular landscape stone.

Geological facts

Sandstone formations like the Grand Canyon or Petra in Jordan showcase the endurance of this rock. It is one of the most common sedimentary rocks in the Earth's crust.

Field identification & locations

Identify in the field by its 'sandpaper' texture and visible layers (bedding). It is found globally in sedimentary basins. Collectors often look for examples with unique fossils or 'picture' banding.