sedimentary

Jasper

Microcrystalline quartz (SiO2)

Hardness of 6.5-7 on the Mohs scale, waxy luster, opaque, and exhibits various colors often with banded or striped patterns.

Identified November 14, 2026More sedimentary →

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Physical properties

Hardness of 6.5-7 on the Mohs scale, waxy luster, opaque, and exhibits various colors often with banded or striped patterns.

Formed from silica-rich solutions precipitating in sedimentary environments or hydrothermal veins over millions of years.

Used primarily for 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 polish.

Identify by its hardness, conchoidal fracture, and inability to be scratched by steel; commonly found in riverbeds and mountainous regions.

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