sedimentary
Red Jasper
Microcrystalline Quartz (SiO2)
AI-generated identification · may be incorrectMohs hardness of 6.5-7, opaque red to brownish-red color, vitreous to dull luster, microcrystalline crystal structure with conchoidal fracture.
Identified More sedimentary →
Explore Red Jasper in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Mohs hardness of 6.5-7, opaque red to brownish-red color, vitreous to dull luster, microcrystalline crystal structure with conchoidal fracture.
Formation & geological history
Formed through the hydrothermal deposition of silica-rich fluids or accumulation of silica-laden radiolarian oozes in marine environments.
Uses & applications
Used extensively in ornamental carvings, cabochons, jewelry, and as a decorative landscaping stone.
Geological facts
Red jasper has been used since ancient times for amulets, seals, and weaponry, mentioned frequently in ancient lapidary texts.
Field identification & locations
Easily identified by its deep red color, lack of cleavage, and ability to scratch glass; commonly found in riverbeds and mountainous regions worldwide.
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