Prismarine Shards are aqua-colored items obtained by defeating Guardians and Elder Guardians, the hostile mobs found in and around ocean monuments. These shards can be used to craft various blocks like prismarine, prismarine bricks, and dark prismarine, which are primarily used for building and decoration. Additionally, they are a component in the recipe for sea lanterns, a light-emitting underwater block.
The numerical item ID for Prismarine Shard is 409
Numerical item IDs will only work in Minecraft versions below 1.13.
The item ID for Prismarine Shard is minecraft:prismarine_shard
This is the spawn command to give yourself Prismarine Shard in Minecraft which includes the Minecraft /give command. If you are using the Essentials plugin you will need to use /minecraft:give instead of /give