sedimentary
Red Jasper
Microcrystalline Quartz (SiO2)
Hardness of 6.5 to 7 on the Mohs scale, red to reddish-brown color due to iron oxide inclusions, opaque transparency, waxy to vitreous luster, trigonal crystal system, 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 6.5 to 7 on the Mohs scale, red to reddish-brown color due to iron oxide inclusions, opaque transparency, waxy to vitreous luster, trigonal crystal system, conchoidal fracture.
Formation & geological history
Formed by the precipitation of silica from water, often in marine environments or hydrothermal veins, commonly associated with iron-rich sedimentary deposits.
Uses & applications
Used in jewelry, ornamental carvings, polished stones, and as a collector's specimen.
Geological facts
Red jasper has been used since ancient times for talismans, seals, and weaponry. Its vibrant red color comes from hematite impurities within the quartz matrix.
Field identification & locations
Easily identified by its deep red color, lack of cleavage, and high hardness which scratches glass. Found worldwide, particularly in India, Brazil, Russia, and the USA.
More like this
Other sedimentary specimens
Sandstone or Siltstone
Arenite (if sandstone)
Sedimentary
Sedimentary Sandstone
Arenite (Sedimentary Rock)
sedimentary
Fossiliferous Concretion
Septarian Concretion containing Brachiopods/Crinoids
fossil
Banded Siltstone / Mudstone Pebble
Siltstone / Argillite
sedimentary
Shale (or Mudstone/Siltstone)
Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
sedimentary
Shale
Shale (clastic sedimentary rock)
sedimentary