sedimentary
Sandstone
Quartz Arenite / Sedimentary Rock
Hardness: 6-7 on Mohs scale (due to quartz grains); Color: Brown, tan, reddish-brown; Luster: Dull to earthy; Crystal structure: Clastic texture composed of sand-sized mineral particles or rock fragments, primarily quartz.
- Hardness
- 6-7 on Mohs scale (due to quartz grains)
- Color
- Brown, tan, reddish-brown
- Luster
- Dull to earthy
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Physical properties
Hardness: 6-7 on Mohs scale (due to quartz grains); Color: Brown, tan, reddish-brown; Luster: Dull to earthy; Crystal structure: Clastic texture composed of sand-sized mineral particles or rock fragments, primarily quartz.
Formation & geological history
Formed from the accumulation, compaction, and cementation of mineral particles or rock fragments, typically in environments such as deserts, rivers, beaches, or shallow marine areas over millions of years.
Uses & applications
Used widely in construction as building stone, paving material, and in the production of concrete and glass.
Geological facts
Sandstone often preserves ancient ripples from water currents or wind patterns from deserts, providing valuable clues about Earth's ancient environments.
Field identification & locations
Easily identified by its gritty, sandpaper-like texture and visible sand grains. Found worldwide in regions with ancient sedimentary basins.
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Sandstone or Siltstone
Arenite (if sandstone)
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Septarian Concretion containing Brachiopods/Crinoids
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Quartz pebble
Silicon dioxide (SiO2)
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Generic Pebble / Rock Fragment
Lithic fragment / Weathered rock
sedimentary
Sedimentary Sandstone
Arenite (Sedimentary Rock)
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Banded Siltstone / Mudstone Pebble
Siltstone / Argillite
sedimentary