I've always wanted to put some type of water feature on my property. The wife doesn't like the idea because she is afraid our grandson won't stay out of it. Last weekend I was at a local landscape business and noticed they had ponds on display with big granite rocks with a hole drilled through the center and set up as a fountain. I came up with a plan that I could set one on river rock with a catch basin underneath to place the pump. There wouldn't be any water standing on the surface. I have access to a coring machine at work. Now my question. Will a diamond core bit work to drill the hole? I know they are spendy and don't want to take a chance in wrecking it.