sedimentary
Quartz pebble
Silicon dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, white to pale yellow color, vitreous luster, hexagonal crystal system when formed, conchoidal fracture with no true cleavage, and a specific gravity of 2.65.
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 pale yellow color, vitreous luster, hexagonal crystal system when formed, conchoidal fracture with no true cleavage, and a specific gravity of 2.65.
Formation & geological history
Formed through the mechanical weathering and prolonged aqueous transportation of parent igneous or metamorphic rocks, smoothing rough edges over millions of years.
Uses & applications
Used in landscaping, decorative stone, and as raw material for aggregate in construction.
Geological facts
Quartz is one of the most abundant and durable minerals in Earth's continental crust, highly resistant to both chemical and physical weathering.
Field identification & locations
Easily identified by its high hardness which scratches glass and lack of reaction to acid; commonly found in riverbeds, beaches, and conglomerate rock formations worldwide.
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