This should be repairable by a company that specializes in
granite countertops. If it is tiny, they would just sand down the area around to get rid of the chip, then repolish the surface.If it is deep, they can fill it with a patch made of
granite and
epoxy that becomes almost invisible when done right...the same stuff they use to blend the joint of two separate pieces. When dry and polished it would blend right in.Look for specialists in your area.