Coral Block

A coral block is a solid block that comes in five variants: tube, brain, bubble, fire, and horn.

Breaking

Coral blocks can be obtained only with a pickaxe enchanted with Silk Touch; if mined with a pickaxe not enchanted with Silk Touch, they drop the respective dead coral block.

Natural generation

Coral blocks naturally generate in coral reef structures, which can be found in warm oceans.

Trading

Wandering traders may sell 1 of any coral block for 3 emeralds.

Mob loot

, wandering traders have a chance of 8.5% (increased by 1% per level of Looting) to drop 1 coral block when killed while showing the item as trade offer, if the player holds an emerald.

Placement

In order for a coral block to stay alive, at least one of the six directly adjacent blocks must be water or a waterlogged block. If placed outside of water, it transforms into its respective dead coral block after 3 to 4.95 seconds or 2.25 seconds — a grayscale version of the coral block. A coral block still dies if the game rule randomTickSpeed is set to . Once a coral block dies, it is not possible to turn a dead coral block into a live coral block. , coral blocks do not die if they are surrounded by any non-air blocks.

Sea pickle farm blocks

If sea pickles are planted on live coral blocks, using bone meal on the sea pickles increases the number of sea pickles and creates more sea pickles on nearby coral blocks. Specifically, they can spread to the original sea pickle's level or one level below, out to a horizontal taxicab distance of 2. This only works on living coral blocks, not dead coral blocks.