I have always found the process of using Feathers and Wedges to split a stone so fascinating. I think it is the coolest thing that the force these small tools provide is enough to split stone. More importantly, the fact that you can somewhat shape the stone through the placement of the holes is even more amazing.
In this short video, you will see about 20 minutes of work condensed to a little over 1 minute. While 20 minutes may seem like a long time, it reduces this 4' x 4' x 1' block by 1/4 and shapes the end of the tail of one of my birds for "Cir Liberum"