Cobblestone

Cobblestone is a block in MCPE that is obtained by either mining Stone or Cobblestone. It is mineable with a wood Pickaxe or higher. It is used in tools, slabs, and many other things. Cobblestone can also be used to construct the Nether Reactor.

Crafting
Stone Tools

Furnace

Stonecutter

Trivia

 * Stone or cobblestone can be mined by hand but it will not yield the resource after being broken.
 * You can make a cobblestone generator with Water and Lava.
 * It can be cooked in a furnace to make Stone.
 * It must be broken or mined with Wooden Pikaxe or higher to obtain the block