Crimson Nylium

Overview

Crimson Nylium is a Nether block in Minecraft Java Edition 1.21.4. It has no crafting recipe — you collect it by mining it where it generates. A hardness of 0.4 means it is one of the quicker blocks to clear.

Mine it with a wooden pickaxe or better, or you get no drop at all. Instead of dropping itself it yields Netherrack. It offers almost no protection from explosions (0.4 blast resistance).

A full stack holds 64. It is not used in any crafting recipe.

About the crimson set

Crimson is not wood at all — it is fungus, harvested from the huge crimson fungi that grow on nylium in the crimson forest — and that biology gives the whole set its defining property: crimson blocks are completely fireproof. They will not burn, fire will not spread across them, and lava will not set them alight, which makes crimson and warped the only sensible building materials anywhere near lava or in the Nether generally. The set covers planks, stairs, slabs, fences, gates, doors, trapdoors, signs, hanging signs, buttons and pressure plates, but there is no crimson boat, because a stem is not a log. Crimson stems strip with an axe like a log and the planks are a deep maroon-red found nowhere else. Bone meal on crimson nylium grows a new huge fungus instantly, so the set is fully renewable from one nylium block.

How long it takes to break

Crimson Nylium has a hardness of 0.4. By hand that is 2 seconds per block; with the correct tool at netherite tier it is 0.1 seconds.

The block still breaks with a weaker tool, but below wooden it yields nothing at all — the time is spent and the drop is lost, which is the single most common way players waste a vein.

Each Efficiency level adds level² + 1 to the tool's speed, so a level V tool clears this about 2 times faster than an unenchanted one.

* breaks the block but yields no drop
Tool	No enchantment	Efficiency III	Efficiency V
Hand *	2 s	2 s	2 s
Wooden	0.3 s	instant	instant
Stone	0.15 s	instant	instant
Iron	0.1 s	instant	instant
Diamond	0.1 s	instant	instant
Netherite	0.1 s	instant	instant
Golden	instant	instant	instant

Properties

Crimson Nylium resists blasts at 0.4, which is not enough to survive anything explosive nearby. Light does not pass through it, and it emits none of its own. A single slot takes 64, the usual full stack. A pickaxe is fastest here; any other class mines it at bare-hand speed, because the bonus only applies to the class the block is tagged for. Broken normally it drops Netherrack rather than itself; Silk Touch is what returns the block, and Fortune raises the ordinary drop instead.

Transparent: No
Required tool: Wooden Pickaxe

Drops

Crimson Nylium drops Netherrack.

Netherrack

Guides and tools that cover this

Frequently asked questions

How do you get Crimson Nylium in Minecraft?

Crimson Nylium generates naturally in the world; breaking it yields Netherrack.

What tool do you need to break Crimson Nylium?

Wooden Pickaxe or better is required; anything weaker destroys the block without dropping it.

Is Crimson Nylium blast resistant?

Crimson Nylium has a blast resistance of 0.4, so an explosion nearby will destroy it.

How many Crimson Nylium fit in one stack?

64 per stack, so a double chest holds 3,456 Crimson Nylium.

How long does Crimson Nylium take to break?

With the correct tool at netherite tier it takes 0.1 seconds; by hand it takes 2 seconds.