How can I repair a granite countertop where multpile chunks have broken off?
Given that you have a normal size sink you can get up to 48" pieces for less than $100 and sometimes as little as $40-50 for a smaller top.  You aren't going to be happy paying money (you buying materials is $40) and then seeing that the granite with deformations and epoxy lines.  (craigslist has many people selling leftover granite sink tops)