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Not to be confused with Mycelium.
"Nether Grass Block" redirects here. For the main ground block in the overworld, see Grass Block. For other uses, see Grass (disambiguation).
Crimson Nylium JE1 BE1.png
Warped Nylium JE1 BE1.png

No‌[JE only]
Yes‌[BE only]


Yes (64)


Blast resistance










Catches fire from lava


Nylium is a variant of netherrack that generates in the Nether. It has two variants: warped nylium and crimson nylium.


Natural generation[edit]

Warped nylium generates in the warped forest biome, and crimson nylium generates in the crimson forest biome.


Nylium only drops itself when mined with a pickaxe enchanted with Silk Touch; otherwise, it drops netherrack. Nylium can also be picked up if dropped by an Enderman.

Block Nylium
Hardness 0.4
Breaking time[A]
Default 2
Wooden 0.3
Stone 0.15
Iron 0.1
Diamond 0.1
Netherite 0.1
Golden 0.05
  1. Times are for unenchanted tools as wielded by players with no status effects, measured in seconds. For more information, see Breaking § Speed.

Chest loot[edit]

Item Structure Container Quantity Chance
Java Edition
Crimson Nylium Bastion remnant Hoglin stable chest 2–7 22.8%
Bedrock Edition
Crimson Nylium Bastion remnant Hoglin stable chest 2–7 26.2%


Using bone meal on netherrack that is placed next to or adjacent to warped or crimson nylium transforms the netherrack into nylium of that type. No block can be above the netherrack during this process. This transformation can also be done by activating a dispenser with bone meal directly into that netherrack block.


Similar to grass blocks and mycelium, nylium decays (immediately on a random tick) into netherrack when an opaque block is placed above it. However, unlike grass blocks and mycelium, it does not decay underneath water and lava.[1]

Like mycelium and podzol, mushrooms can remain on nylium blocks in any light level. Huge mushrooms can be grown by using bone meal on mushrooms planted on nylium.

Fungi can likewise be grown into huge fungi using bone meal, though the fungus must be placed on the same type of nylium, or the bone meal will not even be consumed.

Similar to grass blocks, the player can apply bone meal to nylium. This nylium, along with nearby nylium, generate vegetation that occurs in their native biome (crimson nylium generates mostly crimson forest vegetation and warped nylium generates mostly warped forest vegetation).

Note Blocks[edit]

Nylium can be placed under note blocks to produce "bass drum" sound.


Java Edition:

SoundSubtitleSourceDescriptionNamespaced IDTranslation keyVolumePitchAttenuation
Block brokenBlocksOnce the block has brokenblock.nylium.breaksubtitles.block.generic.break0.85?16
None[sound 1]BlocksFalling on the block with fall damageblock.nylium.fallNone[sound 1]0.5?16
Block breakingBlocksWhile the block is in the process of being brokenblock.nylium.hitsubtitles.block.generic.hit0.25?16
Block placedBlocksWhen the block is placedblock.nylium.placesubtitles.block.generic.place0.85?16
FootstepsBlocksWalking on the blockblock.nylium.stepsubtitles.block.generic.footsteps0.151.016
  1. a b MC-177082

Bedrock Edition:[more information needed]

Data values[edit]


Java Edition: {{ID table |showblocktags=y |showforms=y |generatetranslationkeys=java |displayname=Crimson Nylium |spritetype=block |nameid=crimson_nylium |blocktags=enderman_holdable, mushroom_grow_block, nylium, mineable/pickaxe

NameNamespaced IDBlock tags (JE)
Warped Nyliumwarped_nyliumenderman_holdable

Bedrock Edition:

NameNamespaced IDNumeric ID FormTranslation key
Crimson Nyliumcrimson_nylium487Block & Itemtile.crimson_nylium.name
Warped Nyliumwarped_nylium488Block & Itemtile.warped_nylium.name


Java Edition
September 28, 2019Crimson Nylium JE1 BE1.png Warped Nylium JE1 BE1.png Crimson and Warped nylium is announced at MINECON Live 2019.
Then they use a planks sound.
1.1620w06aCrimson Nylium JE1 BE1.png Warped Nylium JE1 BE1.png Added nylium.
20w07aWarped nylium now has a 1109 (~0.92%) chance of being offered by piglins when bartering, in a stack size of 1, making it renewable.
20w09aWarped nylium now has a 5226 (~2.21%) chance of being offered by piglins when bartering, in a stack size of 1–5.
20w10aWarped nylium can no longer be obtained by bartering with piglins, making it no longer renewable.
20w12aNylium can now be fertilized with bone meal to grow roots, fungi and nether sprouts.
20w16aCrimson nylium now generates in chests within bastion remnants.
20w22aNylium now drops netherrack, unless broken with Silk Touch, in which case it drops itself.
Bedrock Edition
1.16.0beta Nylium JE1 BE1.png Warped Nylium JE1 BE1.png Added nylium.
Nylium can be fertilized with bone meal to grow roots and fungi.
beta nylium now generates in chests within bastion remnants.


Issues relating to "Nylium" are maintained on the bug tracker. Report issues there.


  • The name is a portmanteau of "Nether" and "Mycelium", the name of the part of a fungus analogous to roots.


  1. MC-173356 "Nylium doesn't decay under water, waterlogged blocks, or lava" resolved as "Works as Intended"