- Amazing hand granite rock mining skill - Amazing fastest stone splitting technique - Modern Constrution equipment machines

All my respect for these men who work the stone :) and even more for those who worked it at the time of ancient Egypt (for example) without a backhoe to help them. This remains a know-how that impresses me a lot. I have always had an unconditional admiration for people working with their hands and achieving incredible things.
 I've used the technique shown at 6:55 to cut concrete garden edgers. I used a claw hammer to hit a wedge-shaped hammer like the one in the video. After doing it on multiple garden projects, I learned why you shouldn't hit two hardened steel heads together. A piece of the claw hammer head the size of a large BB spalled at what must have been the speed of a bullet, penetrated several inches into the left side of my chest, and came to rest outside one of my ribs. It's still there. Not long after that I found a replay of the TV show Mythbusters, where they  "proved" that it couldn't happen.  Ahhh I see the idea behind it.  You hammer in all of the spikes until they are almost submerged.  Then you go back and hit each spike with another spike, to see if it's lose or not.  When you find the one that isn't loose, you leave it in there and then hit it and it breaks the whole rock... pretty frickin ingenious if you ask me.  This is very old technology, before iron, the tools were bronze, before bronze they were arsenic hardened copper. But still some thing to watch the skill of the mason and be amazed at seeing rock split along their line, it never get old!