sedimentary
Jasper
Microcrystalline Quartz (SiO2)
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, opaque luster, massive or microcrystalline crystal structure, and a conchoidal fracture. Displays vivid red, brown, and yellow banding.
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, massive or microcrystalline crystal structure, and a conchoidal fracture. Displays vivid red, brown, and yellow banding.
Formation & geological history
Formed via the precipitation of silica-rich fluids or volcanic ash in marine environments, often dating back to the Precambrian era.
Uses & applications
Widely utilized for making ornamental objects, cabochons, carvings, and polished display specimens.
Geological facts
Jasper has been prized since ancient times as a sacred gemstone and talisman, referenced in numerous historical texts.
Field identification & locations
Identified easily by its lack of cleavage, waxy luster, and opaque multicolored patterns. Common worldwide, especially in areas with ancient volcanic or sedimentary activity.
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