sedimentary
Jasper
Microcrystalline Quartz (SiO2)
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, opaque luster, various colors including red, brown, and yellow, and a cryptocrystalline 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, opaque luster, various colors including red, brown, and yellow, and a cryptocrystalline structure with conchoidal fracture.
Formation & geological history
Formed through the silification of sedimentary or volcanic rocks, where silica-rich fluids replace original material over millions of years.
Uses & applications
Used primarily for ornamental objects, cabochons, carved gemstones, and lapidary art.
Geological facts
Ancient civilizations prized jasper for talismans and amulets, believing it brought courage and protected against illness.
Field identification & locations
Identified by its opaque nature, waxy luster, and colorful banding or patterns; commonly found in riverbeds and mountainous regions 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
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