How to remove water rings from marble?

It takes a long while, but I removed a water stain on my marble table by constant polishing it with toothpaste. At first I left a huge gob of paste for around 3 hours.....removed paste......then reapplied.......wipe off with clean cloth...etc. Too kind me two days.....but did not harm the marble and it looks great.

Marble is a soft stone. I would use polishing compound.

https://www.bing.com/videos/search?q=How+to+remove+water+rings+from+marble%3f&qpvt=How+to+remove+water+rings+from+marble%3f&FORM=VDRE

http://www.themarblecleaner.com/remove-water-stains-marble/

https://homeguides.sfgate.com/remove-water-spots-marble-countertops-90254.html

Have you tried using mineral oil? Since marble is a soft stone it can actually dry out and crack if not treated properly.

I used it on the tile in my master bath and it looked like it had just been installed. I was pretty impressed.

So simple. Make a paste of baking soda and water. Place it over the stain. Cover with plastic wrap. Let it dry overnight. Then just wipe off.