sedimentary

Polychrome Jasper (Desert Jasper)

Silicon Dioxide (SiO2) with iron and mineral inclusions

Hardness: 6.5-7 (Mohs scale); Color: Swirls of red, brown, tan, grey, and teal; Luster: Vitreous to waxy (when polished); Crystal Structure: Hexagonal (Microcrystalline); Cleavage: None/Conchoidal fracture; Specific Gravity: 2.58-2.91

Hardness: 6
Color: Swirls of red, brown, tan, grey, and teal
Luster: Vitreous to waxy (when polished)

Identified March 18, 2026More sedimentary →

Identify your own rocks.

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

App Store Google Play

Physical properties

Formation & geological history

Formed through the infiltration of silica-rich fluids into volcanic ash or fine sediment, followed by slow cooling and pressure. These specimens typically originate from the Cretaceous period (approx. 66-145 million years ago) in the Norcross area of Madagascar.

Uses & applications

Primarily used as a lapidary material for decorative carvings, palm stones, jewelry cabochons, and as a metaphysical/collector's stone.

Geological facts

Discovered relatively recently (around 2006) during a search for new deposits of Ocean Jasper in Madagascar. It is known for its unique 'landscape' patterns that look like desert paintings.

Field identification & locations

Identify in the field by its opaque, multi-colored circular or wavy patterns and high hardness that cannot be scratched by a steel pocket knife. Found almost exclusively in Madagascar. For collectors, look for high color contrast and absence of cracks.

Other sedimentary specimens

See all

Sandstone or Siltstone

Arenite (if sandstone)

Sedimentary

Sandstone

Arenite (primarily SiO2)

sedimentary

Shale or Slaty Mudstone

Argillaceous sedimentary rock

sedimentary

Chert Breccia

Brecciated Chert (Microcrystalline Silica)

sedimentary

Sandstone (Quartz-rich)

Arenite (SiO2)

sedimentary

Sandstone (with man-made markings)

Arenite (composed primarily of Quartz, SiO2)

sedimentary