So, while I was playing on a survival world, i wanted to make pistons for a piston door, but I didn't have any cobblestone on hand, so I thought I could use deepslate instead. When I went to use cobbled deepslate, the recipe didn't work, so I also tried to do it with blackstone, but it didn't work either. If deepslate and blackstone are meant to be alternatives for cobblestone, how come this recipe won't work?