Mossy Cobblestone is a variant of cobblestone covered in moss, primarily used for decorative purposes. It generates naturally in monster rooms, jungle pyramids, pillager outposts, and several village structures. It can also be found in trial chambers around zombie spawners. It requires a pickaxe to be mined; otherwise, it drops nothing. With a hardness of 2, it is more durable than stone but relatively easy to break.

Mossy Cobblestone can be crafted using cobblestone and either vines or moss blocks. It can also be crafted into slabs, stairs, and walls, or obtained through stonecutting. Like other stone-based blocks, Mossy Cobblestone has no additional functional uses. It can be placed under note blocks to produce a bass drum sound.