Question: what are prismarine shards used for in minecraft?
Answer: Prismarine Shards are items added in snapshot 14w25a (1.8). They can be obtained by defeating the Guardian and Elder Guardian mob, which can be found in Ocean Monuments. They can be crafted into Prismarine variants, such as Prismarine Brick and Dark Prismarine. They are also used to craft Sea Lanterns.