Dark Prismarine is a deep cyan-colored variant of Prismarine, primarily found in ocean monuments. It features a tight grid pattern and is used decoratively in underwater structures.
It can be obtained through crafting using Prismarine Shards and Black Dye or Ink Sacs. Dark Prismarine is used for building, crafting slabs and stairs, and activating conduits for underwater breathing. When placed under a note block, it produces a 'bass drum' sound.