sedimentary
Green Jasper
Microcrystalline quartz, SiO2
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, opaque green color, vitreous to dull luster, and microcrystalline trigonal structure.
Identified More sedimentary →
Explore Green 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 green color, vitreous to dull luster, and microcrystalline trigonal structure.
Formation & geological history
Formed by the precipitation of silica-rich fluids in sedimentary environments or hydrothermal veins, often dating back over 500 million years.
Uses & applications
Used extensively in ornamental carvings, cabochons, jewelry, and polished collector specimens.
Geological facts
Green jasper has been prized since antiquity for talismans and seals due to its toughness and rich earthy tones.
Field identification & locations
Identified by its conchoidal fracture, lack of cleavage, and resistance to steel scratching; commonly found in stream beds and metamorphic-sedimentary contact zones 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