sedimentary

Jasper

Microcrystalline Quartz (SiO2)

Hardness of 6.5-7 on the Mohs scale, opaque luster, various earth tones including red, brown, and green, with conchoidal fracture.

Identified November 9, 2026More sedimentary →

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Physical properties

Hardness of 6.5-7 on the Mohs scale, opaque luster, various earth tones including red, brown, and green, with conchoidal fracture.

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

Used primarily in lapidary arts, decorative objects, jewelry, and by mineral collectors.

Jasper has been used since ancient times for seals, talismans, and ornamental tools due to its durability and polish.

Identified by its waxy luster, opacity, and intricate color 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

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)