sedimentary
Jasper
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, opaque luster, microcrystalline quartz structure, colors include red, brown, yellow, and green.
Identified More sedimentary →
Explore Jasper in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness of 6.5 to 7 on the Mohs scale, opaque luster, microcrystalline quartz structure, colors include red, brown, yellow, and green.
Formation & geological history
Formed from silicon-rich silica precipitates and sediments in marine or hydrothermal environments over millions of years.
Uses & applications
Used widely for ornamental carvings, polished cabochons in jewelry, and decorative landscaping stones.
Geological facts
Ancient civilizations used jasper for protective amulets and primitive tools due to its durability and fine fracture.
Field identification & locations
Identify by its waxy luster, conchoidal fracture, and inability to be scratched by a steel knife. Commonly found in riverbeds and volcanic deposits 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