sedimentary
Green Jasper
Microcrystalline Quartz (SiO2)
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, deep green color often with subtle mottling, vitreous to dull luster, and cryptocrystalline structure with conchoidal fracture.
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, deep green color often with subtle mottling, vitreous to dull luster, and cryptocrystalline structure with conchoidal fracture.
Formation & geological history
Formed through the hydrothermal deposition of silica-rich fluids or chemical precipitation in marine environments, often dating from the Precambrian to Paleozoic eras.
Uses & applications
Commonly used in cabochons, carved ornaments, tumbled stones, and lapidary art.
Geological facts
Green jasper has been utilized since ancient times for amulets and seals due to its toughness and ability to take a fine polish.
Field identification & locations
Identified by its waxy-to-vitreous luster, high hardness that scratches glass, and opaque green coloration. Found worldwide in riverbeds and sedimentary deposits.
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