sedimentary
Jasper
Microcrystalline Quartz (SiO2)
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, waxy luster, opaque, and conchoidal fracture with varied earthy tones.
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, waxy luster, opaque, and conchoidal fracture with varied earthy tones.
Formation & geological history
Formed from silica-rich sediments or volcanic ash, typically precipitating in marine environments or hydrothermal veins over millions of years.
Uses & applications
Used extensively for ornamental carvings, cabochons, jewelry, and decorative stone work.
Geological facts
Ancient cultures frequently used jasper for talismans, seals, and weaponry due to its toughness and ability to take a high polish.
Field identification & locations
Identified in the field by its opacity, hardness exceeding steel, and smooth waxy waterworn exterior found in stream beds.
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