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This article is about the current version of DF.
Note that some content may still need to be updated.

Not to be confused with Slate.
Spoiler2010.png This article contains massive spoilers. If you do not wish to have your game experience spoiled, do not scroll down!

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Fire-safe Magma-safe

Slade is the stone that makes up the surrounding layers of eerie caverns. After dwarves dig deep enough down into adamantine veins, large, demonic caverns made of slade will open up and spew forth demons. Underworld spires and vaults are also made entirely of slade.

Slade is very, very heavy[Verify] – according to the density specified in the raws (200 grams per cubic centimeter, about the density of the core of the sun!), a single boulder weighs around 20 metric tons; by comparison, an equivalent volume of freshly mined platinum nuggets only weighs around 2.1 metric tons (and takes a very long time to haul) - this makes slade around 9.348 times as dense as platinum, and thus the heaviest material in the game.

It is not possible to mine through slade walls. You can still obsidian-cast them and then mine that, but this will not yield any slade boulders.

It is possible to use weapons made out of this extremely dense material in Arena mode – tests show that weapons and armor made out of this superdense rock are at least comparable to, if not stronger than even adamantine. In fortress mode, it is possible to obtain slade bars by embarking on a vault and deconstructing the vertical bars within. Through a strange mood slade weapons can be created.

Slade has a natural immunity to dragonfire since it does not have a specific heat or any state change temperatures defined in the raws.

D4Dwarf.png This article or section has been rated D for Dwarf. It may include witty humour, not-so-witty humour, bad humour, in-jokes, pop culture references, and references to the Bay12 forums. Don't believe everything you read, and if you miss some of the references, don't worry. It was inevitable.

It may be interesting to note that our friends at Wikipedia also believe [1] Slade to be a hard rock and a heavy metal.

The insanely high weight seen during trading.


  • Although slade is not intended to be diggable, it can be channeled through floors from above, leaving the wall underneath it.Bug:708
  • Jewelers may randomly try to cut slade, despite not finding any of it on the map.