sedimentary
Sandstone
Quartz arenite / Lithic sandstone
Hardness of 6 to 7 on the Mohs scale, colors range from tan, brown, yellow, and red to pink and white, dull or earthy luster, clastic texture composed mostly of quartz and feldspar grains, poor to moderate cleavage.
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Physical properties
Hardness of 6 to 7 on the Mohs scale, colors range from tan, brown, yellow, and red to pink and white, dull or earthy luster, clastic texture composed mostly of quartz and feldspar grains, poor to moderate cleavage.
Formation & geological history
Formed through the accumulation, deposition, and lithification of mineral particles or rock fragments of sand size, typically in environments such as deserts, beaches, rivers, and shallow marine areas over millions of years.
Uses & applications
Widely used as a construction material for building facades, paving stones, flagstones, retaining walls, and historically for grinding stones and whetstones.
Geological facts
Many of the world's most famous monuments and ancient temples, such as Petra in Jordan and the temples of Angkor Wat, were carved directly out of massive sandstone formations.
Field identification & locations
Easily identified by its gritty texture resembling sandpaper and visible sand grains. Found worldwide in sedimentary basins, desert regions, and ancient riverbeds.
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Other sedimentary specimens
Sandstone or Siltstone
Arenite (if sandstone)
Sedimentary
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
Sedimentary Sandstone
Arenite (Sedimentary Rock)
sedimentary