sedimentary

Jasper

Microcrystalline Quartz (SiO2)

Hardness of 6.5-7 on the Mohs scale, opaque luster, various earth tones including red, brown, and yellow, with a trigonal crystal structure.

Identified November 12, 2026More sedimentary →

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

Physical properties

Hardness of 6.5-7 on the Mohs scale, opaque luster, various earth tones including red, brown, and yellow, with a trigonal crystal structure.

Forms from the precipitation of silica-rich fluids in sedimentary environments or hydrothermal deposits, often occurring over millions of years.

Commonly used in ornamental carvings, jewelry, lapidary art, and as a collector's mineral specimen.

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 opaque nature, smooth fracture, and high hardness that scratches glass. Found worldwide in riverbeds and mountainous 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

Sandstone

Arenite

Shale

Shale (clastic sedimentary rock)

Shale (or Mudstone/Siltstone)

Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)