sedimentary
Jasper
Microcrystalline quartz (SiO2)
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, opaque luster, various earth tones including green, brown, and red colors, trigonal crystal system with cryptocrystalline 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 to 7 on the Mohs scale, opaque luster, various earth tones including green, brown, and red colors, trigonal crystal system with cryptocrystalline structure.
Formation & geological history
Formed from silica-rich fluids precipitating in sedimentary environments or hydrothermal veins, often over hundreds of millions of years.
Uses & applications
Used primarily for ornamental carvings, polished decorative items, and lapidary jewelry.
Geological facts
Jasper has been utilized by ancient civilizations since the 4th millennium BC for seals, drills, and talismans.
Field identification & locations
Identify by its opaque nature, conchoidal fracture, and lack of reactivity to acid; commonly found globally in riverbeds and ancient seabed deposits.
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