sedimentary
Mineral Grit / Sand Grains
Siliciclastic sediment (predominantly Quartz, SiO2)
AI-generated identification · may be incorrectHardness 6-7 on Mohs scale, grayish-white to tan color, vitreous to dull luster, sub-angular to rounded clastic grains.
Identified More sedimentary →
Explore Mineral Grit / Sand Grains in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness 6-7 on Mohs scale, grayish-white to tan color, vitreous to dull luster, sub-angular to rounded clastic grains.
Formation & geological history
Formed via physical weathering, erosion, and mechanical breakdown of pre-existing continental rocks like granite or sandstone.
Uses & applications
Aggregates are widely used in construction, concrete production, filtration systems, and abrasives.
Geological facts
Quartz grains are extremely resistant to both chemical and mechanical weathering, enabling them to survive multiple sediment cycles.
Field identification & locations
Identified by tiny millimeter-scale crystalline or lithic fragments; typically tracked indoors on shoes from outdoor soils or gravel.
More like this
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
Fossiliferous Sedimentary Rock
Sedimentary limestone with invertebrate fossil imprint
fossil
Sandstone or Siltstone
Arenite (if sandstone)
Sedimentary
Sandstone
Arenite
sedimentary
Shale
Shale (clastic sedimentary rock)
sedimentary
Shale (or Mudstone/Siltstone)
Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
sedimentary