sedimentary

Crocodile Jasper

Microcrystalline Quartz (SiO2)

Hardness of 6.5 to 7 on the Mohs scale, featuring distinct green, brown, and yellow orbicular patterns with a waxy to vitreous luster.

Identified October 26, 2026More sedimentary →

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Physical properties

Hardness of 6.5 to 7 on the Mohs scale, featuring distinct green, brown, and yellow orbicular patterns with a waxy to vitreous luster.

Formed through the deposition and silification of organic or volcanic ash sediments in marine environments over millions of years.

Widely used for ornamental carvings, polished crystal towers, lapidary arts, and metaphysical jewelry.

Also known as Kambaba Jasper, it is not a true jasper scientifically, but rather a microcrystalline quartz mixed with stromatolites.

Easily identified by its unique crocodile-skin-like green and black orbicular patterns; commonly sourced from South Africa and Madagascar.

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)