sedimentary
Sandstone Pebble
Sedimentary quartz arenite
Hardness of 6-7 on the Mohs scale, typically brown to reddish-brown in color, dull or earthy luster, granular texture, composed primarily of quartz grains cemented together.
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Physical properties
Hardness of 6-7 on the Mohs scale, typically brown to reddish-brown in color, dull or earthy luster, granular texture, composed primarily of quartz grains cemented together.
Formation & geological history
Formed through the accumulation, compaction, and cementation of mineral particles or rock fragments, often in desert, river, or beach environments, over millions of years.
Uses & applications
Used primarily in landscaping, decorative ground cover, and as an aggregate in construction materials.
Geological facts
Sandstone can record ancient environmental conditions through its cross-bedding structures, showing the direction of ancient winds or water currents.
Field identification & locations
Commonly found in riverbeds, beaches, and sedimentary rock formations worldwide. Identified by its gritty texture and visible sand grains.
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Other sedimentary specimens
Fossiliferous Sedimentary Rock
Sedimentary limestone with invertebrate fossil imprint
fossil
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