sedimentary

Ocean Jasper

Orbicular Jasper (Silicon Dioxide, SiO2)

AI-generated identification · may be incorrect

Hardness: 6.5-7 on Mohs scale; Color: Deep green with white/cream spherulitic inclusions; Luster: Vitreous to waxy; Crystal structure: Hexagonal (microcrystalline/cryptocrystalline); Cleavage: None; Specific Gravity: 2.58-2.91

Hardness: 6
Color: Deep green with white/cream spherulitic inclusions
Luster: Vitreous to waxy

Identified May 24, 2026More sedimentary →

Explore Ocean Jasper in the encyclopedia →

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 flow of silica-rich hydrothermal fluids through volcanic rock (rhyolite), cooling to create unique orbicular patterns. Found specifically in the Marovato region of Madagascar along the coast.

Uses & applications

Predominantly used for ornamental carvings, jewelry (cabochons), and as high-end collector specimens. Valued in the metaphysical community for its unique appearance.

Geological facts

Ocean Jasper is only found in one specific location in Madagascar and can often only be mined during low tide. The original vein (Kabamby) was exhausted, and newer veins have slightly different color palettes.

Field identification & locations

Identify by its unique 'orbicular' circular patterns (spherulites) against a dark base. It is frequently polished to reveal the 'flower' like patterns and has a concave or conchoidal fracture if broken.