How to Remove Mineral Deposits from Granite Countertops


Annette asked: How do I remove white mineral deposits from granite countertops? The countertop behind the faucet has this ashy, white, chalky surface as a result of water settling there where the surface is apparently lower.

White mineral deposits on granite countertops are a typical result of hard water. If the countertop has been properly maintained and resealed on schedule (typically every 6-12 months) the mineral deposits will be topical and relatively easy to remove. If the countertop seal has been compromised, you may need to call in a professional. Here’s what you should do.

You Will Need:

Steps to Remove the Stain:

  1. To quickly test the seal on your counter top, sprinkle a couple of drops of water on the surface. If the water soaks in, your protective seal is inadequate and it’s time to call a pro. If the water beads, your seal is still good. Wipe the water away quickly to avoid further stains.
  2. Using the clean razor blade and a steady hand, gently scrape away the mineral scale. Use caution not to gouge the countertop. Rather than trying to get it all at once, make several passes with the razor blade until the residue has been removed. Never use abrasive scrubbers. They will damage the seal, the countertop or both.
  3. Once you’ve scraped the scale away, use the soft cloth to apply the countertop cleaner. Be sure to follow label directions. A good granite countertop cleaner will help protect the surface against future damage.

Additional Tips and Advice

  • Vinegar is a common product used to remove hard water deposits. Avoid using acidic cleansers such as vinegar unless the product is specifically recommended by the manufacturer. Acid can cause pitting and damage to the sealant. The end result may be worse than what you started with and will likely require a professional fix.
  • If the suspect spot recurs near a faucet or sink, make a habit of wiping the area frequently. If water isn’t left to stand on the countertop, it’s not likely to cause a stain.
  • Adhere to recommended maintenance schedules and use only products designated for granite countertops to keep your counters looking their best.
  • Hard water sufferers may benefit from installing a water softener. If mineral scaling is a constant problem, often marked by cloudy dishes and lime scale in sinks and showers, it may be time to consult a professional about treating your home’s water.


  1. Vanessa says:

    Could anyone tell me how to remove a brown staining on my light-colored Caesarstone bench around the wash basin in my bathroom. The back of the basin sits very close to the splashback Caesarstone wall and is constantly getting wet.

  2. Melanie says:

    If the brown stain is coming out from under the wash basin, it is probably from plumber’s putty (used to seal the faucet). You can hopefully remove the stain, but you will need to have the putty replaced, otherwise it will just continue to return. Use the info in the How to Remove Stains from Granite Countertops article. Plumber’s putty is often oil-based, so you will want the acetone poultice.
    Source: – Avoid Plumber’s Putty Stains On Granite

  3. Stephanie says:

    Just had my granite entryway cleaned and polished. Entryway is black granite. After workmen left, I noticed marks that looked like something had been spilled onto the granite. A company spokesman told me it was markings that were embedded in granite and came to surface with cleaning. He says there is nothing they can do to fix it. I had never seen these imperfections be for, and I do notice things. Is he right, or can this be fixed?

  4. Angela says:

    My granite top in the kitchen is about 8 years old. The only place that needs help us is next to the sink. The surface has become rough. It used to be smooth and shiny. I’m assuming the water is causing this roughness. What to do?

  5. Melanie says:

    The roughness you are describing sounds like etching, which is damage. Unfortunately, the only solution for etching is to have the stone refinished.
    Source: CountertopSpecialty – Granite Countertop Dull Around Sink

  6. Pippen says:

    I used the edge of a nail file to remove a narrow hard water deposit from granite around the base of a faucet. It seemed to work OK.

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