sedimentary
Green Jasper
Microcrystalline Quartz (SiO2)
Hardness of 6.5 to 7 on the Mohs scale, earthy to vitreous luster, opaque transparency, conchoidal fracture, and specific gravity of 2.58 to 2.91.
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, earthy to vitreous luster, opaque transparency, conchoidal fracture, and specific gravity of 2.58 to 2.91.
Formation & geological history
Forms from silica-rich fluids precipitating in sedimentary environments or filling fractures in volcanic and metamorphic rocks, often dating back hundreds of millions of years.
Uses & applications
Used primarily in lapidary arts, making cabochons, beads, decorative carvings, and as a collector's mineral specimen.
Geological facts
Jasper has been used since ancient times for talismans, seals, and weaponry. Green varieties often owe their coloration to trace amounts of iron or chromium.
Field identification & locations
Found worldwide in association with iron formations, riverbeds, and hydrothermal veins. Identify by its dense microcrystalline structure, lack of visible crystal faces, and hardness.
More like this
Other sedimentary specimens
Sandstone or Siltstone
Arenite (if sandstone)
Sedimentary
Quartz pebble
Silicon dioxide (SiO2)
sedimentary
Fossiliferous Concretion
Septarian Concretion containing Brachiopods/Crinoids
fossil
Generic Pebble / Rock Fragment
Lithic fragment / Weathered rock
sedimentary
Sedimentary Sandstone
Arenite (Sedimentary Rock)
sedimentary
Banded Siltstone / Mudstone Pebble
Siltstone / Argillite
sedimentary