sedimentary

Red Jasper

Silicon dioxide with iron inclusions (Chalcedony)

Hardness of 6.5 to 7 on the Mohs scale, opaque red to brownish-red color, waxy to vitreous luster, and microcrystalline trigonal structure.

Identified October 28, 2026More sedimentary →

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Physical properties

Hardness of 6.5 to 7 on the Mohs scale, opaque red to brownish-red color, waxy to vitreous luster, and microcrystalline trigonal structure.

Formed by the precipitation of silica from thermal or marine waters, often enriched with iron oxides in sedimentary environments.

Commonly used in tumbled stones, cabochons, carvings, and ornamental jewelry.

Red jasper has been utilized since ancient times for talismans, seals, and weaponry components across various civilizations.

Identified by its opaque red color and conchoidal fracture; globally distributed and frequently found in riverbeds and ancient marine deposits.

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)