sedimentary

Jasper

Silicon dioxide (SiO2)

Hardness of 6.5-7 on the Mohs scale, earthy to waxy luster, opaque, and comes in various colors including red, brown, yellow, and green.

Identified November 8, 2026More sedimentary →

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Physical properties

Hardness of 6.5-7 on the Mohs scale, earthy to waxy luster, opaque, and comes in various colors including red, brown, yellow, and green.

Formed from silicon-rich fluids precipitating in sedimentary environments or hydrothermal veins, often over millions of years.

Used widely in ornamental carvings, jewelry, and polished display pieces.

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

Identify by its opacity, conchoidal fracture, and vibrant color patterns. 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

Sandstone

Arenite

Shale

Shale (clastic sedimentary rock)

Shale (or Mudstone/Siltstone)

Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)