Polished blackstone bricks are a decorative version of polished blackstone. Source: Minecraft API

A wall is a decorative block. Like fences, they can be used to create boundaries, because players and most mobs cannot climb or jump over them. Source: Minecraft API

Stairs are blocks that allow mobs and players to change elevation without jumping. Source: Minecraft API

Slabs are half-height versions of their respective blocks. Source: Minecraft API

Polished blackstone is the stone-like polished variation of blackstone. Source: Minecraft API

Basalt is an igneous rock found in the Nether. Source: Minecraft API

Stairs are blocks that allow mobs and players to change elevation without jumping. Source: Minecraft API

Slabs are half-height versions of their respective blocks. Source: Minecraft API

Andesite is a block of igneous rock, most often found in large pockets in the ground. Source: Minecraft API

A spawn egg is an item used to spawn mobs directly. Source: Minecraft API