Polished Deepslate is a refined variant of cobbled deepslate, used primarily as a decorative block. It is crafted by combining four cobbled deepslate or obtained through stonecutting. Naturally, it generates in ancient cities.

It has higher hardness than regular stone and is used to craft deepslate bricks, deepslate tiles, slabs, stairs, and walls. Stonecutters allow direct conversion of cobbled deepslate into its derivatives. When placed under a note block, it produces a 'bass drum' sound.