sedimentary
Jasper
Microcrystalline Quartz (SiO2)
Hardness of 6.5-7 on the Mohs scale, earthy to vitreous luster, opaque transparency, conchoidal fracture, and colors ranging from brown, red, yellow, to green often with mottled or banded patterns.
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 6.5-7 on the Mohs scale, earthy to vitreous luster, opaque transparency, conchoidal fracture, and colors ranging from brown, red, yellow, to green often with mottled or banded patterns.
Formation & geological history
Formed through the accumulation of silica-rich sediments or volcanic ash, typically in marine environments, undergoing diagenesis and lithification over millions of years.
Uses & applications
Used primarily in lapidary work, decorative carvings, cabochons, and as a collector's mineral specimen.
Geological facts
Jasper has been used since ancient times to create seals, talismans, and jewelry, with mentions dating back to antiquity across various civilizations.
Field identification & locations
Found worldwide in riverbeds, ancient marine deposits, and mountainous regions; identifiable by its hardness, opacity, and smooth polished texture when water-worn.
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