sedimentary
Sandstone Pebble
Sedimentary Rock (Quartzose Sandstone)
Hardness: 6-7 on Mohs scale (due to quartz grains); Color: Tan, brown, or grayish-green; Luster: Dull or earthy; Structure: Clastic with rounded sand grains cemented together; Specific Gravity: 2.2-2.8
- Hardness
- 6-7 on Mohs scale (due to quartz grains)
- Color
- Tan, brown, or grayish-green
- Luster
- Dull or earthy
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Physical properties
Hardness: 6-7 on Mohs scale (due to quartz grains); Color: Tan, brown, or grayish-green; Luster: Dull or earthy; Structure: Clastic with rounded sand grains cemented together; Specific Gravity: 2.2-2.8
Formation & geological history
Formed by the accumulation, compaction, and cementation of mineral particles or rock fragments, predominantly quartz, deposited by water, wind, or ice, often over millions of years in desert, river, or beach environments.
Uses & applications
Used primarily as aggregate in construction, road base, and historically as a building material or whetstone.
Geological facts
Sandstone can preserve ancient environments through ripple marks and fossilized tracks left behind when the sand was originally deposited.
Field identification & locations
Commonly found in riverbeds, beaches, and sedimentary rock formations worldwide; identified by its grainy texture resembling fine sandpaper.
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