sedimentary
Jasper
Silicon dioxide (Microcrystalline quartz, SiO2)
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, typically yellow, brown, or red in color, with a waxy to dull luster and a cryptocrystalline structure.
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, typically yellow, brown, or red in color, with a waxy to dull luster and a cryptocrystalline structure.
Formation & geological history
Formed via the precipitation of silica-rich fluids within sedimentary or volcanic environments, often accumulating in marine basins over geological timescales.
Uses & applications
Widely used in ornamental carvings, cabochons, jewelry, and as a decorative stone for collectors.
Geological facts
Jasper has been utilized by ancient civilizations since the 4th millennium BC for seals, drills, and talismans.
Field identification & locations
Identified by its opaque appearance, conchoidal fracture, and lack of reactivity to acid; commonly found in riverbeds and mountainous regions globally.
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