I live in the "Granite Center of the World," Barre, VT, and I don't know anyone who has a granite sink. But I had a granite countertop in my old house. It was great for rolling out pie/cookie dough, but it did stain a bit. It was sealed to help with that, but I noticed some areas that got slightly stained anyway. I should think a sink would be more vulnerable to stains if you're washing dishes all the time.