sedimentary
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, deep red to brownish-red color, vitreous to dull luster, microcrystalline crystal structure (chalcedony), conchoidal fracture with no true cleavage, and a specific gravity of 2.58 to 2.91.
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 6.5 to 7 on the Mohs scale, deep red to brownish-red color, vitreous to dull luster, microcrystalline crystal structure (chalcedony), conchoidal fracture with no true cleavage, and a specific gravity of 2.58 to 2.91.
Formation & geological history
Red jasper is an opaque, microcrystalline variety of quartz that forms in sedimentary environments or through the hydrothermal alteration of silica-rich rocks, where iron oxide impurities impart its characteristic red color.
Uses & applications
Commonly used in ornamental carvings, cabochons, polished tumbled stones, jewelry making, and as a collector's specimen.
Geological facts
Jasper has been used since ancient times by various civilizations, including the ancient Egyptians who carved it into amulets and seals for protection.
Field identification & locations
Can be identified in the field by its opaque red color, hardness that can scratch glass, and smooth waxy or vitreous polish. It is found worldwide, with major deposits in India, Brazil, Russia, and the USA.
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