How to Fix a Burn Stain on Marble
- 1). Wipe the burn mark with a wet washcloth.
- 2). Mix one part ammonia with one part water. Pour it over the burn mark on the marble and let it sit for at least 5 minutes.
- 3). Rub the burn stain with a soft scrub brush to lift away the black residue.
- 4). Repeat Steps 1 through 3 if the burn stain has not totally disappeared.
- 5). Wipe the marble surface with a little dish soap and water to wash it clean.
Source...