sedimentary
Sandstone
Arenite (SiO2 principal component)
AI-generated identification · may be incorrectHardness: 6-7 (Mohs); Color: Tan, beige, or grey; Luster: Dull/Earthy; Crystal structure: Clastic texture; Specific gravity: 2.2–2.8
- Hardness
- 6-7 (Mohs)
- Color
- Tan, beige, or grey
- Luster
- Dull/Earthy
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Physical properties
Hardness: 6-7 (Mohs); Color: Tan, beige, or grey; Luster: Dull/Earthy; Crystal structure: Clastic texture; Specific gravity: 2.2–2.8
Formation & geological history
Formed over millions of years by the accumulation and cementation of sand-sized mineral grains or rock fragments, typically in riverbeds, deserts, or marine environments.
Uses & applications
Used extensively in construction as a building material, in the glass industry as a source of silica, and as a decorative stone in landscaping.
Geological facts
Sandstone can contain fossils and provides vital clues about prehistoric environments; it is often the primary reservoir rock for oil and natural gas.
Field identification & locations
Identified by its gritty feel like sandpaper and visible grains; commonly found in varied geological strata including canyons and riverbanks.
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Other sedimentary specimens
Fossiliferous Sedimentary Rock
Sedimentary limestone with invertebrate fossil imprint
fossil
Sandstone or Siltstone
Arenite (if sandstone)
Sedimentary
Sandstone
Arenite
sedimentary
Quartz pebble
Silicon dioxide (SiO2)
sedimentary
Shale
Shale (clastic sedimentary rock)
sedimentary
Shale (or Mudstone/Siltstone)
Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
sedimentary