sedimentary
Sandstone (Paving Stone)
Arenite / Quartzose Sandstone (primarily SiO2)
AI-generated identification · may be incorrectHardness of 6-7 on Mohs scale (quartz grains); earthy to dull luster; reddish-pink to brownish color; granular clastic texture.
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Physical properties
Hardness of 6-7 on Mohs scale (quartz grains); earthy to dull luster; reddish-pink to brownish color; granular clastic texture.
Formation & geological history
Formed through the compaction and cementation of mineral particles and rock fragments (typically quartz and feldspar) in desert, river, or coastal environments.
Uses & applications
Widely quarried and cut for use in construction, flagstone paving, patio stones, and architectural cladding.
Geological facts
Red or pinkish hues in sandstone typically indicate the presence of iron oxide (hematite) coating the grains.
Field identification & locations
Identified in the field by its gritty 'sandpaper' feel and visible sand-sized grains; extremely common worldwide in sedimentary rock basins.
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Other sedimentary specimens
Fossil-bearing concretion, possibly containing a fossil shell or other organic inclusion
Calcareous concretion; exact fossil and host-rock composition are not identifiable from the image
fossil
Sandstone or Siltstone
Arenite (if sandstone)
Sedimentary
Fossiliferous Sedimentary Rock
Sedimentary limestone with invertebrate fossil imprint
fossil
Sandstone
Arenite
sedimentary
Shale
Shale (clastic sedimentary rock)
sedimentary
Shale (or Mudstone/Siltstone)
Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
sedimentary