The edges of your granite counter top can be any shape that you want.  Above you will find many popular edge styles.  Each edge profile is a different price depending on the amount of labor required.

There are many colors available in granite.  Colors can vary as the quarry can change from time to time.  You will want to view your slabs before the cutting begins.  Different colors come from quarries all over the world.  Pricing depends on how many quarries are quarrying the color at the present time.  If there are a few quarries with the same colors the price is lowered.   Price is determined by supply and demand usually.