sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, white to gray color, vitreous luster, and trigonal crystal system with no cleavage.
Identified More sedimentary →
Explore Quartz Pebble in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness of 7 on the Mohs scale, white to gray color, vitreous luster, and trigonal crystal system with no cleavage.
Formation & geological history
Formed through mechanical weathering and aqueous transport of quartz-bearing rocks, smoothing over millions of years in riverbeds or marine environments.
Uses & applications
Used in landscaping, decorative gravel, tumbling, and as a raw material for silicon extraction.
Geological facts
Quartz is one of the most abundant minerals in the Earth's continental crust and is exceptionally resistant to weathering.
Field identification & locations
Identified by its high hardness, conchoidal fracture on broken surfaces, and lack of reaction to acid; found globally in streams, beaches, and sedimentary conglomerates.
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