sedimentary
Sandstone
Clastic sedimentary rock (Quartz arenite / Arkose)
Hardness varies from 6 to 7 depending on cementation; color ranges from yellow, brown, red, to white; luster is typically dull or earthy; texture is clastic, composed mostly of quartz and feldspar grains; specific gravity is approximately 2.2 to 2.8.
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Physical properties
Hardness varies from 6 to 7 depending on cementation; color ranges from yellow, brown, red, to white; luster is typically dull or earthy; texture is clastic, composed mostly of quartz and feldspar grains; specific gravity is approximately 2.2 to 2.8.
Formation & geological history
Formed by the accumulation, compaction, and cementation of mineral particles or rock fragments, primarily of quartz size, in environments such as deserts, rivers, beaches, and shallow marine areas over millions of years.
Uses & applications
Widely used in construction as a building material, dimension stone, paving stones, and for manufacturing glass, abrasives, and filtering materials.
Geological facts
Many of the world's most famous ancient monuments, such as the temples of Petra and parts of the Egyptian pyramids, were carved directly out of massive sandstone formations.
Field identification & locations
Readily identifiable by its distinct gritty texture, similar to fine sandpaper, and visible bedding planes or parallel lamination layers. Found abundantly worldwide.
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Sandstone or Siltstone
Arenite (if sandstone)
Sedimentary
Fossiliferous Concretion
Septarian Concretion containing Brachiopods/Crinoids
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Quartz pebble
Silicon dioxide (SiO2)
sedimentary
Generic Pebble / Rock Fragment
Lithic fragment / Weathered rock
sedimentary
Banded Siltstone / Mudstone Pebble
Siltstone / Argillite
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Sedimentary Sandstone
Arenite (Sedimentary Rock)
sedimentary