How to Make Cracked Bricks, Deepslate, Prismarine, and End Stone Variants
Cracking stone-family blocks
Cracked versions of the stone families are produced by smelting or blasting the intact block. Cracked Bricks, Cracked Stone Brick Slab, Cracked Stone Brick Stairs, and Cracked Stone Brick Wall cover the stone brick set. Cracked Deepslate Brick Slab, Cracked Deepslate Brick Stairs, and Cracked Deepslate Brick Wall cover deepslate bricks; Cracked Deepslate Tile Slab, Cracked Deepslate Tile Stairs, and Cracked Deepslate Tile Wall cover deepslate tiles.
For the Nether, you get Cracked Nether Brick Slab, Cracked Nether Brick Stairs, and Cracked Nether Brick Wall, plus Cracked Polished Blackstone Brick Slab, Cracked Polished Blackstone Brick Stairs, and Cracked Polished Blackstone Brick Wall.
Prismarine and End Stone
Cracked Prismarine Bricks, Cracked Prismarine Brick Slab, Cracked Prismarine Brick Stairs, and Cracked Prismarine Brick Wall handle the prismarine set. Cracked End Stone Bricks, Cracked End Stone Brick Slab, Cracked End Stone Brick Stairs, and Cracked End Stone Brick Wall handle end stone.
Run the plain block through a furnace or blast furnace to crack it, then cut the cracked block into slabs, stairs, and walls on a stonecutter. Cracking first and cutting second saves fuel, since one cracked block feeds all three shapes. Stockpile plain blocks before you start so you can crack a full batch in one furnace run.