Peakstone Stairs are building-blocks cut into an L-shape made of black rock.
Usually placed as stairs they will smooth the player-character's movement up and down gradients so no jumping is needed. They can be placed as projections of walls or for other purposes too when being rotated by pressing and holding R (as the default key) while moving the mouse.
Peakstone Stairs can be crafted in your Crafting Menu (default key "Q"), but only after the crafting recipe has been unlocked by creating Peakstone Slabs from ordinary blocks of Peakstone by simply putting them into a Processor. No crafting recipe has to be unlocked for that.
To craft 4 (blocks of) Peakstone Stairs at once, you'll need
- 2 Peakstone Slabs made of Peakstone in a Processor
- 1 Stone Rod made of Stone, Limestone or Bedrock in a Processor
- 2x Melted Wax made of Beeswax in a Forge or looted from Wood Treasure Chests or Stone Treasure Chests