sedimentary

Red Jasper

Silicon Dioxide (SiO2)

Hardness of 6.5-7 on the Mohs scale, opaque red to reddish-brown color with a vitreous to dull luster, and conchoidal fracture with no cleavage.

Identified October 23, 2026More sedimentary →

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Physical properties

Hardness of 6.5-7 on the Mohs scale, opaque red to reddish-brown color with a vitreous to dull luster, and conchoidal fracture with no cleavage.

Formed through the silification of sedimentary deposits or volcanic ash, primarily in marine environments over millions of years.

Widely used in jewelry, ornamental carvings, polished tumbled stones, and decorative mosaics.

Red jasper has been used since ancient times for amulets, seals, and weaponry components like arrowheads due to its toughness.

Identified by its rich red color, microcrystalline structure, and high hardness that scratches glass; commonly found worldwide.

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

Fossiliferous Sedimentary Rock

Sedimentary limestone with invertebrate fossil imprint

Sandstone or Siltstone

Arenite (if sandstone)

Sandstone

Arenite

Shale

Shale (clastic sedimentary rock)

Shale (or Mudstone/Siltstone)

Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)