Take off water stains from brown marble in bathroom?

Hi Mariana. That sounds like a calcium build up. Good old-fashioned white distilled vinegar should take it off for you. Soak a wash cloth with the vinegar and place it on the stains. Leave it there overnight. Next morning remove the wash cloth and scrub the stain with an old toothbrush. Repeat if necessary. Good luck Mariana.

Is it possibly a build up of soap scum or is it outside the shower?

Hello. Is your stone sealed? I have used CLR and Whink on my granite white stains near my sink faucet. It did not harm the stones finish. Be use to use a cleaner that Will not damage your surface.

How To Clean & Remove Stains From Marble & Granite

https://tipnut.com/marble-granite-stains/

Hope this helps you clean your water spots from your marble .

www.themarblecleaner.com › Blog › Marble Cleaning

May 6, 2016 - Remove water stains on marble. Follow our easy marble water stain removal steps below! 1. Use a marble cleaner and clean towel. Water spots ...

Try these:

https://www.hometalk.com/diy/clean/a-solution-for-cleaning-marble-488578

https://www.hometalk.com/diy/clean/bathroom/how-to-clean-natural-shower-tile-the-right-way-marble-granite-glass-27690767

DO NOT use vinegar on marble or granite, it will permanently etch the stone. Here is a granite cleaner recipe that a stone fabricator gave me. I have been using this for years and my granite looks brand spanking new.

Granite (or any counter-top) shine/cleaner ~ Take a spray bottle, fill it about 1/8th full with rubbing alcohol, add a drop of Dawn dish washing soap, a few drops of scented oil (optional, but makes it smell so good), fill the rest of the way with water, shake together, and you’re good to go! It makes your granite (or any counter-top) shine and feel so smooth at a fraction of the price

This will work on hard water stains, but after getting the hard water off then go to the recipe above

To remove water spots, wash the stain with a gentle detergent and water; use a soft bristled brush to scrub lightly. Rinse with clean water and dry. For slightly more stubborn stains, make a paste of baking soda and water, or talc with a diluted solution of ammonia, bleach or hydrogen peroxide.

Try rubbing it off with a dry microfiber cloth.

these are not stains it is worned polish .. marble is supr poures .. you need to re - polish your surface

Efflorescence is minerals rising to the surface from either concrete underlayment or the grout when it gets wet. Its usually removed with an acidic wash of vinegar or muric acid. Since its marble I would test in an unobtrusive corner under the back of the toliet to make sure it won't damage the marble and its color. Make sure you wear rubber gloves, eye glasses, even protective shoes.