sedimentary
Sandstone Pebble
Arenite (Siliclastic sedimentary rock)
Hardness: 6-7 Mohs; Color: Tan, brown, ochre; Luster: Dull/Earthy; Crystal structure: Granular/Clastic; Specific Gravity: 2.2-2.8
- Hardness
- 6-7 Mohs
- Color
- Tan, brown, ochre
- Luster
- Dull/Earthy
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Physical properties
Hardness: 6-7 Mohs; Color: Tan, brown, ochre; Luster: Dull/Earthy; Crystal structure: Granular/Clastic; Specific Gravity: 2.2-2.8
Formation & geological history
Formed via the accumulation and cementation of sand-sized mineral grains or rock fragments (clasts). Common in riverbeds, deserts, and shorelines. Geological age varies widely from Precambrian to Cenozoic.
Uses & applications
Construction material (aggregate), artistic carving, grit for industrial processes, or simple nature collecting.
Geological facts
Sandstone is one of the most common sedimentary rocks on Earth and acts as a major reservoir for groundwater and petroleum due to its porosity.
Field identification & locations
Identify by its gritty, abrasive feel like sandpaper and visible sand-sized grains. Found worldwide in sedimentary basins and eroded river systems.
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