sedimentary
Red Jasper
Microcrystalline Quartz (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, opaque brick-red color due to iron inclusions, and a vitreous to dull luster with a 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
Hardness of 7 on the Mohs scale, opaque brick-red color due to iron inclusions, and a vitreous to dull luster with a conchoidal fracture.
Formation & geological history
Formed from silica-rich sediments or volcanic ash accumulating on ocean floors, undergoing lithification and iron-oxide staining over millions of years.
Uses & applications
Commonly used for tumbled stones, cabochons, carved decorative objects, and jewelry making.
Geological facts
Red jasper has been used since ancient times for talismans and seals. Its red color is strictly caused by microscopic hematite impurities.
Field identification & locations
Easily identified by its opaque red color and hardness that scratches glass; found worldwide in riverbeds and hydrothermal veins.
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