sedimentary
Jasper
Microcrystalline quartz (SiO2)
Hardness of 6.5 to 7 on the Mohs scale, opaque luster, various colors including red, brown, yellow, and green, trigonal crystal system, conchoidal fracture.
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, opaque luster, various colors including red, brown, yellow, and green, trigonal crystal system, conchoidal fracture.
Formation & geological history
Formed from silica-rich solutions in sedimentary or volcanic environments, often through the replacement of organic material or deposition in marine environments.
Uses & applications
Used for ornamental objects, cabochons, carved items, and in jewelry.
Geological facts
Jasper has been used throughout history since ancient times for seals, talismans, and jewelry.
Field identification & locations
Identified by its opacity, smooth microcrystalline texture, and ability to take a high polish. Found worldwide in riverbeds, sedimentary deposits, and volcanic regions.
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