Heart of the Sea

A heart of the sea is an item found only in buried treasure chests. It, alongside nautilus shells, is required to craft a conduit.

Obtaining

A heart of the sea is only obtained from a buried treasure. The location is marked with a noticeable red X on a buried treasure map, which is found in ocean ruins and shipwrecks.

Item	Structure	Container	Quantity	Chance
Java Edition and Bedrock Edition
Heart of the Sea	Buried Treasure	Chest	1	100% { "item": "Heart of the Sea", "stacksize": 1, "chance": 1, "structure": "Buried Treasure", "container": "Chest" }

Name	Ingredients	Crafting recipe
Conduit	Nautilus Shell + Heart of the Sea

Name	Identifier	Form	Translation key
Heart of the Sea	`heart_of_the_sea`	Item	`item.minecraft.heart_of_the_sea`

Name	Identifier	Numeric ID	Form	Translation key
Heart of the Sea	`heart_of_the_sea`	`571`	Item	`item.heart_of_the_sea.name`

Java Edition
1.13	18w15a	Added heart of the sea.
	18w19a	Heart of the sea now generates in all buried treasure chests in a stack of 1.
	18w21a	The rarity of hearts of the sea has been changed from "Common" to "Uncommon".

Bedrock Edition
1.4.0	beta 1.2.14.2	An entry in the buried treasure loot table has been added named `nautilus_core`. It is unobtainable though since the `nautilus_core` has not been added into the game yet.
	beta 1.2.20.1	Added heart of the sea as an item obtainable in buried treasure chests. It cannot be used to craft conduits yet.
	beta 1.2.20.2	The texture of the heart of the sea has been changed to match Java Edition.
1.5.0	beta 1.5.0.1	Heart of the sea can now be used to craft conduits.
1.21.30	Preview 1.21.30.21	Heart of the sea rarity has been changed from "Common" to "Uncommon".

Legacy Console Edition
Xbox 360	Xbox One	PS3	PS4	PS Vita	Wii U	Switch
TU69		1.76	1.76	1.76	Patch 38		Added heart of the sea.

Minecraft Education
1.4.0							Added heart of the sea. It generates in all buried treasure chests in a stack of 1.

Issues relating to "Heart of the Sea" are maintained on the bug tracker. Issues should be reported and viewed there.

Before the heart of the sea was added to Bedrock Edition, there was an entry found in the buried treasure chest loot table named nautilus_core, which was later revealed to be the heart of the sea. Despite the name change, the heart of the sea continues to be referred to as the nautilus_core in most game files.