sedimentary
Jasper
Microcrystalline Quartz (SiO2)
AI-generated identification · may be incorrectHardness of 6.5-7 on the Mohs scale, waxy luster, opaque, and exhibits conchoidal fracture. Colors range widely due to iron impurities, showing red, brown, yellow, and green bands.
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, waxy luster, opaque, and exhibits conchoidal fracture. Colors range widely due to iron impurities, showing red, brown, yellow, and green bands.
Formation & geological history
Forms from the precipitation of silica-rich fluids in sedimentary environments or hydrothermal veins, often over millions of years. Common in ancient marine deposits and volcanic regions.
Uses & applications
Used extensively for ornamental carvings, cabochons, polished decorative objects, and historical stone tools due to its durability.
Geological facts
Jasper has been prized since ancient times for talismans and seals, with mentions dating back to early civilizations. Its distinct earthy patterns make each piece unique.
Field identification & locations
Identify it by its smooth waxy feel, lack of cleavage, and distinct opaque color banding. Found globally in riverbeds, mountainous regions, and desert varnish outcrops.
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