sedimentary

Jasper

Microcrystalline Quartz (SiO2)

Hardness of 6.5-7 on the Mohs scale, opaque luster, featuring earthy red and yellow banded colors with a cryptocrystalline 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, featuring earthy red and yellow banded colors with a cryptocrystalline structure.

Formed through the deposition of silica-rich fluids in sedimentary environments or volcanic cavities, often over millions of years.

Widely used for ornamental carvings, polished cabochons, jewelry, and as a popular specimen for mineral collectors.

Jasper has been used since ancient times for talismans, seals, and weaponry due to its durability and striking patterns.

Easily identified by its opaque nature and conchoidal fracture; commonly found in riverbeds and mountainous regions 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

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)