sedimentary
Jasper
Silicon dioxide (Microcrystalline quartz, SiO2)
AI-generated identification · may be incorrectMohs hardness of 6.5 to 7. Colors range from yellow, brown, and red to green. It exhibits a waxy to dull luster and a 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
Mohs hardness of 6.5 to 7. Colors range from yellow, brown, and red to green. It exhibits a waxy to dull luster and a conchoidal fracture.
Formation & geological history
Forms through the precipitation of silica-rich fluids within sedimentary environments or volcanic ash beds, often during low-temperature hydrothermal activity.
Uses & applications
Used primarily in lapidary arts, ornamental carvings, jewelry making, and as a decorative stone for collectors.
Geological facts
Jasper has been used since ancient times for talismans, seals, and tools. Yellow jasper specifically symbolizes grounding and protection.
Field identification & locations
Identify by its opaque nature, conchoidal fracture, and lack of visible crystal grains without a microscope. It is globally distributed in riverbeds and mountainous terrain.
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