sedimentary
Jasper
Silicon Dioxide (Microcrystalline Quartz)
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, earthy to vitreous luster, conchoidal fracture, and opaque with various colors including red, brown, yellow, and green.
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, earthy to vitreous luster, conchoidal fracture, and opaque with various colors including red, brown, yellow, and green.
Formation & geological history
Formed through the silica-rich precipitation in sedimentary environments or hydrothermal solutions, often associated with volcanic ash.
Uses & applications
Used primarily for ornamental objects, cabochons, jewelry, and lapidary art due to its ability to take a high polish.
Geological facts
Jasper has been used since ancient times for talismans, seals, and weaponry components like arrowheads.
Field identification & locations
Identify by its waxy luster, lack of cleavage, hardness scratching glass, and opaque earthy tones. Commonly found worldwide in riverbeds and mountainous regions.
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