sedimentary
Jasper
Microcrystalline Quartz (SiO2)
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, opaque luster, various earth tones including brown, red, yellow, and green, trigonal crystal system with a microcrystalline structure, and 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 earth tones including brown, red, yellow, and green, trigonal crystal system with a microcrystalline structure, and conchoidal fracture.
Formation & geological history
Formed from silica-rich sediments or volcanic ash, often deposited in marine or lacustrine environments and consolidated over millions of years through diagenesis.
Uses & applications
Used in ornamental carvings, cabochons for jewelry, decorative objects, and as a polishing stone.
Geological facts
Jasper has been used since ancient times to create seals, signet rings, and various ornaments, highly prized by ancient civilizations such as the Greeks, Romans, and Egyptians.
Field identification & locations
Identified by its opaque nature, waxy to dull luster, and ability to take a high polish. Commonly found in riverbeds, alluvial deposits, and mountainous regions worldwide.
More like this
Other sedimentary specimens
Fossiliferous Sedimentary Rock
Sedimentary limestone with invertebrate fossil imprint
fossil
Sandstone or Siltstone
Arenite (if sandstone)
Sedimentary
Sandstone
Arenite
sedimentary
Quartz pebble
Silicon dioxide (SiO2)
sedimentary
Shale
Shale (clastic sedimentary rock)
sedimentary
Shale (or Mudstone/Siltstone)
Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
sedimentary