No idea where this came from. Just noticed today. Can't tell what it is. I tried to scrub it semi-hard (don't wanna do too hard for fear of scratching) with a towel and water and did not succeed in cleaning. Is it oil/grease? Feels weird on my finger. Appreciate your help!

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  • To check if it is oil or grease, use a mild mixture of dish detergent and water. The marble looks well sealed, so soap should not be a problem.
    – wallyk
    Aug 24 '13 at 16:57
  • Thank you. What do I do eith the mix and how does it tell me if its oil or not?
    – rabbid
    Aug 25 '13 at 0:31
  • Dab some on a paper towel, wipe across the spots, scrub vigorously, rinse, dry, and look. If the spots are gone, it was either dirt or grease.
    – wallyk
    Aug 25 '13 at 0:39
  • Thanks. If I scrub too vigorously won't the marble scratch?
    – rabbid
    Aug 25 '13 at 2:21
  • Not with a paper towel. There is no need for much abrasion in this scenario. If it is oil, it will be soaked up layer by layer with each wipe.
    – wallyk
    Aug 25 '13 at 2:22

Bleach is safe to use on marble. Take a dish scouring pad and a heavy bleach mixture - wear gloves. Scrub away.

  • I would not use a scouring pad as this will scratch the marble, made that mistake once scrubbing my wife's crystal vase trying to get the scum line off, I did not realize how bad it was scratched until it dried, my wife was not happy. Marble will be easily scratched with a scouring pad.
    – Ed Beal
    Feb 20 '18 at 17:40
  • 1
    There are basically two types of "scouring pads" on the market. Those designed for bare metal, and they will scratch. And those designed for non-stick teflon/plastic surfaces. This later type will not scratch most things. Always be careful as the "dirt" may be abrasive too.
    – DaveM
    Aug 17 '19 at 16:26

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