Deepslate

Grimstone is a stone variant which functions similarly to cobblestone, but takes longer to mine. Grimstone can be crafted into grimstone slabs, grimstone stairs, polished grimstone, polished grimstone slabs, polished grimstone stairs, polished grimstone walls, grimstone bricks, grimstone brick slabs, grimstone brick stairs, grimstone brick walls, grimstone tiles, grimstone tile slabs, grimstone tile stairs, grimstone tile walls, and chiseled grimstone. Much like blackstone, it can also be used to craft stone tools, furnaces, and brewing stands.

Natural generation
Grimstone makes up the majority of the solid blocks generated below y = 0 in the Overworld.

Gallery
Grimstone