sedimentary
Jasper
Microcrystalline Quartz (SiO2)
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, opaque luster, various earth-tone colors, and 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 earth-tone colors, and conchoidal fracture.
Formation & geological history
Formed from silica-rich fluids precipitating in sedimentary environments or hydrothermal veins over millions of years.
Uses & applications
Used primarily in lapidary work, decorative carvings, cabochons, and gemstone jewelry.
Geological facts
Jasper has been utilized by ancient peoples since the 4th millennium BC for making tools, seals, and amulets.
Field identification & locations
Identified by its opacity, waxy luster, and smooth water-worn texture; commonly found in riverbeds and gravel bars 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
Sandstone or Siltstone
Arenite (if sandstone)
Sedimentary
Fossiliferous Sedimentary Rock
Sedimentary limestone with invertebrate fossil imprint
fossil
Sandstone
Arenite
sedimentary
Shale
Shale (clastic sedimentary rock)
sedimentary
Shale (or Mudstone/Siltstone)
Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
sedimentary