sedimentary
Sandstone
Arenite (SiO2 predominantly)
AI-generated identification · may be incorrectHardness: 6-7 Mohs; Color: Tan, brown, yellow, red; Luster: Dull/Earthy; Structure: Clastic; Cleavage: None; SG: 2.2-2.8
- Hardness
- 6-7 Mohs
- Color
- Tan, brown, yellow, red
- Luster
- Dull/Earthy
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Physical properties
Hardness: 6-7 Mohs; Color: Tan, brown, yellow, red; Luster: Dull/Earthy; Structure: Clastic; Cleavage: None; SG: 2.2-2.8
Formation & geological history
Formed through the accumulation and cementation of mineral particles or rock fragments, typically silicate and quartz, in marine or desert environments.
Uses & applications
Widely used in construction for paving and building facades, as well as a reservoir rock for oil and gas.
Geological facts
Sandstone represents about 20-25% of all sedimentary rocks on Earth. Familiar formations include the Grand Canyon.
Field identification & locations
Identified by its gritty sandpaper feel. Common in desert regions and near ancient riverbeds across North America and Europe.
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Other sedimentary specimens
Fossiliferous Sedimentary Rock
Sedimentary limestone with invertebrate fossil imprint
fossil
Sandstone or Siltstone
Arenite (if sandstone)
Sedimentary
Quartz pebble
Silicon dioxide (SiO2)
sedimentary
Generic Pebble / Rock Fragment
Lithic fragment / Weathered rock
sedimentary
Sedimentary Sandstone
Arenite (Sedimentary Rock)
sedimentary
Shale (or Mudstone/Siltstone)
Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
sedimentary