sedimentary

Jasper

Microcrystalline quartz (SiO2)

Hardness of 6.5 to 7 on the Mohs scale, waxy luster, opaque, and occurs in various colors like dark green, brown, and red with conchoidal fracture.

Identified October 20, 2026More sedimentary →

Get a report just like this from any photo, free.

Physical properties

Hardness of 6.5 to 7 on the Mohs scale, waxy luster, opaque, and occurs in various colors like dark green, brown, and red with conchoidal fracture.

Formed through the deposition of silica-rich fluids in sedimentary basins or volcanic environments over millions of years.

Used primarily in ornamental carvings, cabochons, jewelry, and by mineral collectors.

Jasper has been used since ancient times for seals, talismans, and decorative items due to its durability and rich coloration.

Found globally in riverbeds and mountainous regions; identified by its high hardness, opaque appearance, and smooth tumbled texture.

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)