sedimentary

Red Jasper

Silicon Dioxide with iron impurities (SiO2)

Mohs hardness of 6.5 to 7, opaque red color with white quartz banding, vitreous to dull luster, and microcrystalline quartz structure.

Identified October 28, 2026More sedimentary →

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Physical properties

Mohs hardness of 6.5 to 7, opaque red color with white quartz banding, vitreous to dull luster, and microcrystalline quartz structure.

Formed through the hydrothermal deposition of silica-rich fluids in sedimentary environments or volcanic rock fractures.

Widely used for ornamental carvings, polished tumbled stones, cabochons in jewelry, and metaphysical collections.

Red Jasper is an opaque variety of chalcedony that has been valued as an amulet and talisman since ancient times.

Easily identified by its deep red color, lack of cleavage, and hardness exceeding steel; commonly found 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)