sedimentary
Sandstone (Pebble)
Arenite (SiO2 based)
AI-generated identification · may be incorrectHardness: 6-7 Mohs; Color: Brown/Tan; Luster: Dull/Earthy; Structure: Clastic; Cleavage: None; Specific Gravity: 2.2-2.8
- Hardness
- 6-7 Mohs
- Color
- Brown/Tan
- Luster
- Dull/Earthy
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Physical properties
Hardness: 6-7 Mohs; Color: Brown/Tan; Luster: Dull/Earthy; Structure: 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 over millions of years, often in riverbeds or marine environments.
Uses & applications
Commonly used in construction as a building material, for paving, and in the manufacturing of glass and grindstones.
Geological facts
Sandstone is one of the most common sedimentary rocks on Earth and often preserves fossils or ripple marks from ancient environments.
Field identification & locations
Identify by its gritty, sandpaper-like feel and visible grains. Commonly found in deserts, river basins, and coastal areas.
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Other sedimentary specimens
Fossiliferous Sedimentary Rock
Sedimentary limestone with invertebrate fossil imprint
fossil
Sandstone or Siltstone
Arenite (if sandstone)
Sedimentary
Fossiliferous Concretion
Septarian Concretion containing Brachiopods/Crinoids
fossil
Quartz pebble
Silicon dioxide (SiO2)
sedimentary
Generic Pebble / Rock Fragment
Lithic fragment / Weathered rock
sedimentary
Banded Siltstone / Mudstone Pebble
Siltstone / Argillite
sedimentary