Dug Big Rock is a building material made by using a shovel on a big rock. Picking it up slows the player. You can split it by using a chisel on it then hitting it with a mallet to get split big rock. It is used to make Bell Tower, Stone Floor and Stone Wall.
Note: Dug Big Rock can only be picked up by 14+ year old characters and cannot he placed in a cart. As it is slow to move in its whole form (25% of walking speed), it is more efficient to process it into its split form, in which four halves can be placed in a cart. The two split halves can then be re-united (to make Cut Stones).