Prismarine Crystals

Prismarine Crystals are items added in 14w25a that can be obtained by defeating the Guardian mob. They are used to craft Sea Lanterns along with Prismarine Shards. Sea Lanterns also drop them when broken.

Obtaining
Prismarine Crystals drop when you mine a Sea Lantern without silk touch. They spawn naturally in Water Dungeons. They also drop when you kill a Guardian.

History
pt-br:Cristais de Prismarinho