sedimentary
Sandstone
Arenite (primarily SiO2)
Hardness: 6-7 (Mohs); Color: Tan, brown, or rust-red; Luster: Dull/Earthy; Structure: Clastic granular texture; Cleavage: None; Specific Gravity: 2.2-2.8
- Hardness
- 6-7 (Mohs)
- Color
- Tan, brown, or rust-red
- Luster
- Dull/Earthy
Identified More sedimentary →
Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness: 6-7 (Mohs); Color: Tan, brown, or rust-red; Luster: Dull/Earthy; Structure: Clastic granular texture; Cleavage: None; Specific Gravity: 2.2-2.8
Formation & geological history
Formed from the accumulation and cementation of mineral particles or rock fragments (sand) over millions of years in environments like deserts, riverbeds, or ocean floors.
Uses & applications
Used widely in construction for masonry, paving, and decorative garden features. High-purity silica sandstone is used in glass manufacturing.
Geological facts
Sandstone makes up about 20% of all sedimentary rocks on Earth. Its porosity makes it a critical reservoir rock for groundwater and petroleum.
Field identification & locations
Identify by its gritty, sandpaper-like feel and visible grains. Common in arid regions and canyon landscapes like the Southwestern United States.
More like this
Other sedimentary specimens
Sandstone or Siltstone
Arenite (if sandstone)
Sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Shale or Slaty Mudstone
Argillaceous sedimentary rock
sedimentary
Chert Breccia
Brecciated Chert (Microcrystalline Silica)
sedimentary
Sandstone (Quartz-rich)
Arenite (SiO2)
sedimentary
Sandstone (with man-made markings)
Arenite (composed primarily of Quartz, SiO2)
sedimentary