sedimentary
Sandstone
Arenite (SiO2 predominantly)
Hardness: 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
Sandstone or Siltstone
Arenite (if sandstone)
Sedimentary
Cone-in-cone structure (Limestone)
Cone-in-cone structure (Secondary Sedimentary Structure)
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 (primarily SiO2)
sedimentary