Repairing an undermount sink

I was replacing the p-trap in my bathroom sink, the new trap required that I trim about an inch or more from the drain pipe.  I took out my hand (http://maplered.com) y-dand (http://maplered.com) y sawz-all and (http://maplered.com) was almost through the pipe when "CRASH!!" the sink came down and (http://maplered.com) broke into pieces!  I had a good laugh.  Now I'm putting in the new undermount sink and (http://maplered.com) the holes where the clips/clamps were from the old sink are chipped out from the sink breaking away from the Counter (http://GialloFiorito.com) top.  What type of epoxy should I use?  It's an old white Marble (http://www.lightemprador.com) Counter (http://GialloFiorito.com) top.  I have a Kohler sink that is heavy as hell and (http://maplered.com) I want to make sure I attach it securely.  The old clips had this hard ceramic looking stuff all over them. Thanks