sedimentary
Sandstone Pebble
Sedimentary Rock (Quartzose Sandstone)
Hardness of 6-7 on the Mohs scale, predominantly brown or reddish color, dull to earthy luster, clastic crystal/grain structure, no distinct cleavage, specific gravity around 2.2-2.8.
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Physical properties
Hardness of 6-7 on the Mohs scale, predominantly brown or reddish color, dull to earthy luster, clastic crystal/grain structure, no distinct cleavage, specific gravity around 2.2-2.8.
Formation & geological history
Formed through the accumulation, compaction, and cementation of mineral particles or rock fragments, predominantly quartz, over millions of years in various environments such as deserts, rivers, and beaches.
Uses & applications
Commonly used in construction, as dimension stone, for paving, and as raw material for glassmaking. Also popular among amateur rock collectors.
Geological facts
Sandstone is one of the most common types of sedimentary rock on Earth, often preserving ancient environmental conditions through its cross-bedding and fossil content.
Field identification & locations
Easily identified by its gritty, sandpaper-like texture and visible mineral grains. Found worldwide in sedimentary basins, riverbeds, and coastal regions.
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Fossiliferous Sedimentary Rock
Sedimentary limestone with invertebrate fossil imprint
fossil
Sandstone or Siltstone
Arenite (if sandstone)
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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