Sea Prism Stone (Seastone)

Item from One Piece by Eiichiro Oda

A rare mineral that emits the same energy wavelength as the sea itself. Contact with Seastone nullifies Devil Fruit powers completely and drains the user's strength. The Marines' primary tool for containing Devil Fruit users.

Also known as: Seastone, Sea Prism Stone, Kairoseki

What They Know

• Emits the same energy wavelength as the sea — nullifies all Devil Fruit powers on contact
• Used by Marines for handcuffs, prison cells, and warship hull coatings
• Ship hulls coated in Seastone can pass through Calm Belts undetected by Sea Kings
• Wano Country has the world's most advanced Seastone craftsmanship — can work it razor-thin
• Does not affect non-Devil Fruit users — only weakens those who have eaten a fruit
• Standard Marine equipment for capturing and containing Devil Fruit criminals

Connections

• used_by — smoker

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