sedimentary
Sandstone (likely Quartzose Sandstone)
Arenite (composed primarily of SiO2)
Hardness: 6-7 Mohs (depends on cementation); Color: Tan, beige, or buff; Luster: Dull/Earthy; Crystal structure: Granular/Clastic; Cleavage: None; Specific gravity: 2.2-2.8
- Hardness
- 6-7 Mohs (depends on cementation)
- Color
- Tan, beige, or buff
- 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 (depends on cementation); Color: Tan, beige, or buff; Luster: Dull/Earthy; Crystal structure: Granular/Clastic; Cleavage: None; Specific gravity: 2.2-2.8
Formation & geological history
Formed through the accumulation and cementation of sand-sized mineral grains or rock fragments. Typically deposited in riverbeds, deserts, or marine environments over millions of years.
Uses & applications
Commonly used as a building material, in glass manufacturing (if high silica), and for artistic carvings or paving stones.
Geological facts
Sandstone makes up about 20% of all sedimentary rocks on Earth. Distinctive red sandstones (like those in the Grand Canyon) get their color from iron oxide (hematite) coatings on the grains.
Field identification & locations
Identify by its 'sandpaper' feel and visible grains. It is extremely common worldwide. Collectors look for unique shapes (like this heart/ventifact shape) or fossil inclusions.
More like this
Other sedimentary specimens
Sandstone or Siltstone
Arenite (if sandstone)
Sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Chert Breccia
Brecciated Chert (Microcrystalline Silica)
sedimentary
Sandstone Grain
Clastic Sedimentary Rock Grain (SiO2 dominated)
sedimentary
Shale or Slaty Mudstone
Argillaceous sedimentary rock
sedimentary
Sandstone
Arenite
sedimentary