The cobblestone generator will automatically produce cobblestone. This machine consumes RF and requires a power core to be within 30 blocks of it to work. The items are dropped above the block and can be picked up using a hopper and conveyors. The cobblestone can be crushed into gravel or sand by using a crusher and can automatically be sieve with the auto sieve. It is also possible to turn sand into soul sand by using a matter converter.