sedimentary
Sandstone
Arenite/Quartz Arenite
AI-generated identification · may be incorrectHardness: 6-7 (Mohs scale), Color: tan, yellow, red, or brown, Luster: dull, Crystal structure: clastic (granular), Cleavage: none, Specific gravity: 2.2-2.8
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Physical properties
Hardness: 6-7 (Mohs scale), Color: tan, yellow, red, or brown, Luster: dull, Crystal structure: clastic (granular), Cleavage: none, Specific gravity: 2.2-2.8
Formation & geological history
Formed by the compaction and cementation of sand-sized mineral particles or rock fragments, typically in riverbeds, deserts, or coastal environments. Ages range from Precambrian to Recent.
Uses & applications
Extensively used in construction for building blocks, paving, flooring, and as a raw material for glass manufacturing and decorative sculpture.
Geological facts
Sandstone is one of the most common sedimentary rocks in the Earth's crust. It often serves as a reservoir for oil, natural gas, and groundwater due to its high porosity.
Field identification & locations
Identify by its gritty, sand-like texture and visible grains. Commonly found in canyons, modern deserts, and ancient seafloors. Collectors look for unique banding or fossil inclusions.
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Fossiliferous Sedimentary Rock
Sedimentary limestone with invertebrate fossil imprint
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Sandstone or Siltstone
Arenite (if sandstone)
Sedimentary
Quartz pebble
Silicon dioxide (SiO2)
sedimentary
Generic Pebble / Rock Fragment
Lithic fragment / Weathered rock
sedimentary
Sedimentary Sandstone
Arenite (Sedimentary Rock)
sedimentary
Shale (or Mudstone/Siltstone)
Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
sedimentary