sedimentary
Jasper
Microcrystalline Quartz (SiO2)
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, typically brown to red in color with a vitreous to dull luster, and trigonal crystal structure with 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
Hardness of 6.5 to 7 on the Mohs scale, typically brown to red in color with a vitreous to dull luster, and trigonal crystal structure with conchoidal fracture.
Formation & geological history
Formed via the precipitation of silica-rich fluids within sedimentary or volcanic environments, often during ancient hydrothermal activity.
Uses & applications
Commonly used for ornamental carvings, cabochons, jewelry, and polished collector specimens.
Geological facts
Jasper has been utilized by ancient civilizations since the 4th millennium BC for talismans, seals, and tools.
Field identification & locations
Identified easily by its opaque appearance, waxy luster, and resistance to steel scratching; found worldwide in riverbeds and mountainous regions.
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