sedimentary

Polished Red Jasper

SiO2 (Microcrystalline Quartz)

Hardness of 6.5 to 7 on the Mohs scale, deep red color with possible banding, vitreous to dull luster, and conchoidal fracture.

Identified October 19, 2026More sedimentary →

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Physical properties

Hardness of 6.5 to 7 on the Mohs scale, deep red color with possible banding, vitreous to dull luster, and conchoidal fracture.

Formed through the silification of sedimentary deposits or volcanic ash, typically rich in iron oxides which impart the red color.

Commonly carved into ornamental towers, beads, and cabochons for jewelry and crystal healing collections.

Jasper has been used since ancient times for amulets, seals, and weaponry, prized by ancient civilizations like the Egyptians and Minoans.

Identified by its opaque red color and hardness; found globally including in India, Brazil, Russia, and the USA.

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)