sedimentary

Jasper

Silicon dioxide (SiO2)

Hardness of 6.5 to 7 on the Mohs scale, opaque luster, varying colors including red, brown, yellow, and green, with a microcrystalline structure.

Identified November 13, 2026More sedimentary →

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Physical properties

Hardness of 6.5 to 7 on the Mohs scale, opaque luster, varying colors including red, brown, yellow, and green, with a microcrystalline structure.

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

Commonly used in jewelry, ornamental carvings, and as a collector specimen due to its attractive patterns.

Jasper has been used since ancient times for talismans, seals, and weaponry components across various civilizations.

Identified by its waxy luster, opacity, and distinctive multicolored 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