How to Remove Hard-Water Stains From Natural Stone

Hard-water deposits can leave unsightly stains on natural stone surfaces, such as marble, granite, and limestone. Here's a step-by-step guide to remove hard-water stains from natural stone:

Materials Needed:

- Mild detergent (dishwashing liquid)

- Warm water

- Microfiber cloths

- Non-abrasive scouring pad

- Vinegar (distilled white)

- Ammonia (optional, for colored marble or granite)

- Baking soda (optional, for colored marble or granite)

- Plastic wrap

- Toothbrush (optional)

Instructions:

1. Test the Natural Stone Surface:

- Always test a small, inconspicuous area of the stone before applying any cleaning solutions to ensure it does not cause any damage or discoloration.

2. Mild Detergent and Warm Water:

- Make a solution by mixing a small amount of mild detergent with warm water.

- Dampen a microfiber cloth with the solution and gently wipe the stained area.

- Rinse thoroughly with a clean, damp microfiber cloth.

3. Vinegar Solution (for stubborn stains):

- If the hard-water stain persists, try using a vinegar solution.

- Mix equal parts of distilled white vinegar and water.

- Apply the vinegar solution to the stained area using a clean microfiber cloth.

- Let it sit for a few minutes, but don't let it dry completely.

- Gently scrub the area with a non-abrasive scouring pad.

- Rinse thoroughly with a clean, damp microfiber cloth.

4. Ammonia Solution (for colored marble or granite):

- If you're dealing with colored marble or granite, try an ammonia solution.

- Mix equal parts of ammonia and water.

- Dip a toothbrush into the solution and gently scrub the stained area.

- Rinse thoroughly with a clean, damp microfiber cloth.

5. Baking Soda Paste (for colored marble or granite):

- For colored marble or granite, you can also try a baking soda paste.

- Make a paste by mixing baking soda with a small amount of water.

- Apply the paste to the stained area and cover it with plastic wrap.

- Let it sit for several hours or overnight.

- Remove the plastic wrap and gently scrub the area with a non-abrasive scouring pad.

- Rinse thoroughly with a clean, damp microfiber cloth.

6. Repeat the Process:

- If necessary, repeat the cleaning process until the hard-water stains are removed.

Precautions:

- Avoid using harsh or acidic cleaners, as they can damage the natural stone surface.

- Always test any cleaning solution on a small, inconspicuous area before applying it to the entire surface.

- Work in a well-ventilated area.

Prevention:

- To prevent future hard-water stains, consider using a water softener or installing a filtration system.

- Wipe up any water spills promptly to prevent them from drying and leaving stains.

Remember, if you're dealing with a delicate, expensive, or antique piece of natural stone, it's best to consult with a professional stone restoration specialist for proper guidance and assistance.