Cobblestone

Cobblestone (colloquially named cobble/stone) is one of the most common blocks in the game. Its respective tool is the pickaxe.

You are able to obtain cobblestone by making water flow into lava or by mining a rock/stone node, which can be found in almost any cave.

The stone node will drop between 1 and 5 cobble.

Cobblestone can be smelted into regular stone in a Furnace. It is useful for scaffolding as it can be easily broken and is very easy to obtain.