Here is what I found on granite care which is what the wife had been told about care for granite. 

Once a year, a penetrating sealant should be applied. Regular polishing will keep the finish gleaming. Use a penetrating sealant recommended by the supplier or the home builder. Avoid using a stone sealer that will not penetrate the stone, as it will create a cloudy surface that will have to be removed by stripping the entire countertop, using harsh solvents. Remember, the glossy shine isn't caused by a coating on the surface, but by expert polishing using diamond polishing tools.