Fill a bucket halfway with water. Dip a soft-bristled scrub brush into the water and dampen the stained area to fill the pores of stone that surround the stain.
Add a neutral pH stone cleaner to the water according the the package directions.
Dip the scrub brush into the cleaning solution again and gently scrub the stain until it comes up. Do not press hard with the scrub brush to prevent etching.
Rinse the brush in clean water and run it over the stained area to rinse off the cleanser.
Wipe down the stone surface with a clean towel to prevent streaking.