Blackstone Slab is a blackstone variant of a slab. It generates naturally in bastion remnants and can be crafted or obtained through stonecutting. Blackstone slabs can be mined with any pickaxe. If mined without a pickaxe, they drop nothing.
They can be crafted using blackstone or obtained through stonecutting. Blackstone slabs function like other slabs in terms of placement and collision. They can also be placed under note blocks to produce a bass drum sound.