sedimentary

Jasper

Microcrystalline Quartz (SiO2)

Hardness of 6.5 to 7 on the Mohs scale, earthy to vitreous luster, opaque appearance, and conchoidal fracture.

Identified November 13, 2026More sedimentary →

Get a report just like this from any photo, free.

Physical properties

Hardness of 6.5 to 7 on the Mohs scale, earthy to vitreous luster, opaque appearance, and conchoidal fracture.

Formed via the precipitation of silica-rich fluids in sedimentary environments or hydrothermal veins over millions of years.

Commonly used in lapidary arts, decorative carvings, cabochons, and jewelry making.

Jasper has been used since ancient times for talismans, seals, and weaponry components due to its toughness and ability to take a high polish.

Identify by its opacity, hardness, and smooth waxy luster; found worldwide in riverbeds, ancient marine deposits, and volcanic regions.

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

Sandstone or Siltstone

Arenite (if sandstone)

Fossiliferous Sedimentary Rock

Sedimentary limestone with invertebrate fossil imprint

Shale

Fissile Sedimentary Rock

Sandstone

Arenite

Shale

Clastic sedimentary rock