There are a few different things you can use to clean natural stone. You can use a mild cleaning solution of soap and water, or you can use a commercial cleaner specifically made for natural stone. Be sure to read the directions on the cleaner carefully, and test it on a small, inconspicuous area of the stone first to make sure it doesn't damage the surface. You can also use a natural homemade cleaner made from baking soda and vinegar. Mix together equal parts baking soda and vinegar in a spray bottle, and mist the surface of the stone. Let it sit for 5-10 minutes, then wipe it clean with a damp cloth.

The best cleaner for natural stone is a 50-50 mixture of white vinegar and water. Apply it to a soft cloth and wipe the surface clean. If the stain is stubborn, you can use a slightly stronger solution of vinegar and water, but be sure to test it on an inconspicuous area first to make sure that it doesn't damage the surface of the stone.