sedimentary

Jasper

Microcrystalline quartz (SiO2)

Hardness of 6.5 to 7 on the Mohs scale, typically brown, yellow, or red with a waxy luster and conchoidal fracture.

Identified November 14, 2026More sedimentary →

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Physical properties

Hardness of 6.5 to 7 on the Mohs scale, typically brown, yellow, or red with a waxy luster and conchoidal fracture.

Formed by the precipitation of silica-rich fluids in sedimentary environments or volcanic ash beds, often dating from the Precambrian era.

Used in ornamental carvings, cabochons, jewelry, and as a decorative display specimen for rock collectors.

Jasper has been used since ancient times for talismans and seals due to its durability and rich earth-tone patterns.

Identify by its opaque nature, high hardness, and distinct microcrystalline banding; commonly found in riverbeds and mountainous regions 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

Sandstone or Siltstone

Arenite (if sandstone)

Fossiliferous Sedimentary Rock

Sedimentary limestone with invertebrate fossil imprint

Shale

Fissile Sedimentary Rock

Sandstone

Arenite

Shale

Clastic sedimentary rock