sedimentary
Jasper
Microcrystalline quartz (SiO2)
AI-generated identification · may be incorrectHardness of 6.5-7 on the Mohs scale, opaque luster, red to brown or multicolored hues, and conchoidal fracture with no visible crystal 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 6.5-7 on the Mohs scale, opaque luster, red to brown or multicolored hues, and conchoidal fracture with no visible crystal structure.
Formation & geological history
Formed from the silification of sedimentary or volcanic deposits, often precipitated from silica-rich fluids in marine or hydrothermal environments.
Uses & applications
Widely used for ornamental carvings, cabochons, jewelry, and polished display specimens.
Geological facts
Jasper has been used since ancient times for seals, talismans, and weaponry due to its durability and rich color variations.
Field identification & locations
Easily identified by its opaque nature and fine-grained microcrystalline structure; commonly found in riverbeds, hydrothermal veins, and ancient sedimentary 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
Sandstone or Siltstone
Arenite (if sandstone)
Sedimentary
Fossiliferous Sedimentary Rock
Sedimentary limestone with invertebrate fossil imprint
fossil
Sandstone
Arenite
sedimentary
Shale
Shale (clastic sedimentary rock)
sedimentary
Shale (or Mudstone/Siltstone)
Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
sedimentary