sedimentary

Red Jasper

Microcrystalline quartz (SiO2)

Hardness of 6.5 to 7 on the Mohs scale, opaque red to reddish-brown color with a waxy luster, and conchoidal fracture.

Identified October 20, 2026More sedimentary →

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Physical properties

Hardness of 6.5 to 7 on the Mohs scale, opaque red to reddish-brown color with a waxy luster, and conchoidal fracture.

Formed from silica-rich sediments or volcanic ash, often precipitated in marine environments over millions of years.

Widely used for ornamental carvings, polished cabochons in jewelry, and as a collectible decorative stone.

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

Identify by its rich red color, high hardness, and opaque, smooth fracture surfaces; found globally in hydrothermal veins and sedimentary 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)