mineral

Ocean Jasper

Spherulitic Chalcedony (SiO2)

Hardness: 6.5-7 (Mohs scale); Color: Multicolored with reds, greens, creams, and grays; Luster: Vitreous to waxy; Structure: Cryptocrystalline with orbicular or 'poppy' patterns; Cleavage: None; Specific Gravity: 2.6 - 2.65.

Hardness: 6
Color: Multicolored with reds, greens, creams, and grays
Luster: Vitreous to waxy

Identified June 27, 2026More mineral →

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Physical properties

Formation & geological history

Formed through the infiltration of silica-rich fluids into volcanic rhyolite or tuff. The characteristic circular patterns are formed through a process called spherulitic growth as minerals crystallize from a center point.

Uses & applications

Primarily used for high-end jewelry, lapidary arts, cabochons, and as decorative collector specimens.

Geological facts

True Ocean Jasper is technically only found in one location in the world and was lost for decades until rediscovered in 1999. It can only be mined at low tide.

Field identification & locations

Identify by its unique orbicular patterns and variety of colors within a single piece. Generally found in coastal deposits in Madagascar. Collectors look for vibrant colors and complete circular 'eyes'.