mineral

Ocean Jasper

Spherulitic Chalcedony (SiO2)

AI-generated identification · may be incorrect

Hardness: 6.5–7; Color: Multi-colored (green, yellow, pink, white, red); Luster: Vitreous to waxy; Crystal Structure: Cryptocrystalline (Trigonal); Cleavage: None; Specific Gravity: 2.58–2.91

Hardness: 6
Color: Multi-colored (green, yellow, pink, white, red)
Luster: Vitreous to waxy

Identified March 18, 2026More mineral →

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

Hardness: 6.5–7; Color: Multi-colored (green, yellow, pink, white, red); Luster: Vitreous to waxy; Crystal Structure: Cryptocrystalline (Trigonal); Cleavage: None; Specific Gravity: 2.58–2.91

Formation & geological history

Formed through the infiltration of silica-rich fluids into volcanic tuff or rhyolite, creating orbicular structures through spherulitic growth. The primary deposit is found in the Marovato area of Madagascar, originating from the Cretaceous era.

Uses & applications

Primarily used for lapidary arts, jewelry, high-end home decor, and metaphysical collecting. Its unique patterns make it highly desirable for cabochons and carvings.

Geological facts

Ocean Jasper is exceptionally rare because it is found only on the coast of Madagascar and can originally only be mined during low tide. The original 'Vei 1' mine is exhausted, making older specimens more valuable.

Field identification & locations

Identify by its distinctive 'orbicular' (eye-like) patterns and circular 'oceans' of color. In the field, look for volcanic host rock with banded or circular silica inclusions. Commonly found in coastal Madagascar.