Cobblestone
Cobblestone is a vanilla block. To learn about cobblestone in vanilla Minecraft, click here
Obtaining
Crushing
Crushing Iron Ore between Crushing Wheels produces Crushed Iron Ore, has a 30% chance of producing an additional 2 Crushed Iron Ore and has a 12% chance of producing 1 Cobblestone
Milling
Milling Andesite in a Millstone produces 1 Cobblestone
Usage
Crushing
Crushing Cobblestone between Crushing Wheels produces 1 Gravel