Ocean jasper rings bring the circular patterns of this rare orbicular stone to your jewelry collection. Found only along the northwest coast of Madagascar and accessible just at low tide, ocean jasper forms in volcanic rhyolite with distinctive orb inclusions. Each ring in our collection pairs genuine ocean jasper with .925 sterling silver settings. Browse 36,638 designs from $6 to $6302, all with free US shipping.
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Ocean jasper forms in a single location along Madagascar's northwest coast near Marovato. Miners can only access the deposits during low tide, which limits extraction and makes this material increasingly rare as deposits deplete.
Ocean jasper measures 6.5 to 7 on the Mohs hardness scale. This rating means it resists scratches from everyday contact and holds up well in ring settings with normal wear.
The spherical patterns form when silica-rich solutions fill gas bubbles in volcanic rock. As the silica crystallizes in layers over time, it creates the concentric circles and orbs that define this stone variety.