sedimentary
Sandstone (Sedimentary Concretion/Disk)
Arenite (predominantly SiO2)
AI-generated identification · may be incorrectHardness of 6-7 on Mohs scale; earthy to dull luster; buff to tan color; gritty, fine-to-medium sand-sized clastic texture.
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Physical properties
Hardness of 6-7 on Mohs scale; earthy to dull luster; buff to tan color; gritty, fine-to-medium sand-sized clastic texture.
Formation & geological history
Formed through the deposition, compaction, and cementation of mineral particles and rock fragments in marine or desert environments.
Uses & applications
Widely used as building stone, pavers, aggregate, and raw material for manufacturing glass and silicon.
Geological facts
Many naturally flat, rounded stones like this are shaped by river or wave erosion, or form as mineral concretions within sedimentary beds.
Field identification & locations
Easily identified by its rough sandpaper-like texture and visible mineral grains; commonly found in riverbeds, beaches, and sedimentary outcrops worldwide.
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