sedimentary
Jasper
Silicon Dioxide (Microcrystalline Quartz)
AI-generated identification · may be incorrectMohs hardness of 6.5 to 7, earthy to vitreous luster, opaque brown color, and conchoidal fracture.
Identified More sedimentary →
Explore Jasper in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Mohs hardness of 6.5 to 7, earthy to vitreous luster, opaque brown color, and conchoidal fracture.
Formation & geological history
Formed by the precipitation of silica-rich fluids in sedimentary basins or volcanic environments.
Uses & applications
Used primarily in lapidary work, decorative cabochons, and ornamental carvings.
Geological facts
Jasper has been used since ancient times for talismans, seals, and weaponry components.
Field identification & locations
Identified by its waxy luster, lack of cleavage, and opaque earthy tones found globally in riverbeds and jasperoid deposits.
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