mineralogical specimen

Ocean Jasper (Orbicular Jasper)

Silica (SiO2) with varied mineral inclusions

Hardness: 6.5-7 (Mohs scale); Color: green, white, cream, pink, and brown in concentric or patchy patterns; Luster: vitreous to waxy when polished; Crystal Structure: microcrystalline (trigonal); Cleavage: none.

Hardness: 6
Luster: vitreous to waxy when polished

Identified June 27, 2026More mineralogical specimen →

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Physical properties

Formation & geological history

Formed as a result of rhythmic precipitation of silica around a nucleus such as a seed crystal or bubble, often found in volcanic flows where silica-rich fluids permeate vesicles. Most famous varieties come from the shores of Madagascar.

Uses & applications

Primarily used for ornamental purposes, lapidary art, jewelry (pendants, beads), and as a popular collector's stone for its unique patterns.

Geological facts

Authentic Ocean Jasper is only found on the coast of Madagascar and can only be mined at low tide. This specimen has been carved and polished into a decorative heart shape.

Field identification & locations

Identified by its distinctive 'orbicular' (eye-like) circular patterns and wide range of colors. It feels cold to the touch and cannot be scratched by a steel knife. Collectors look for high contrast and unique 'eyes'.

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