Limestone is a light grayish block found in Dig Deep. 1 Description 2 Uses 3 Required Tool(s) 4 How To Obtain 5 Skill Statistics Ingame description: "Limestone is a sedimentary rock composed largely of the carbon crystal minerals calcite and/or aragonite." Limestone can be used to make Concrete Bricks. Limestone requires a Wood Pickaxe or betterto be collected. Limestone can be found under ...