I had an interesting request from a contractor to try and cut a hole in a glass bouy.  I havent seen the bouy yet (he is going to bring it by friday).  I know at the very least it will cut a hole completely through it.......has anyone tried to cut a hole in a glass ball or something similar?  Will it blow up?

Piercing might have to be done with diamond coredrill ! 

Piercing might have to be done with diamond coredrill !