Each item in Minecraft has a unique ID assigned to it, known as an item ID, this can be used in commands to spawn the item into the game. The item ID for nautilus shell in Minecraft is shown below:
The Nautilus Shell item can be spawned in Minecraft with the below command. Cheats must be enabled before this will work.
The only use of this item currently is in the crafting recipe of conduits. They can be obtained via fishing and rarely, by drowneds.
|Max Stack Size||64|
|Recipes Used In||Conduit|