How to Remove Mineral Deposits from Quartz Countertops

Quartz countertops are a popular choice for kitchens and bathrooms because of their durability, aesthetics, and low maintenance. However, even this hardy material can develop stubborn mineral deposits over time. Don’t despair – these unsightly stains can be removed with a little elbow grease and the right techniques.

What Causes Mineral Deposits on Quartz?

Quartz is made from ground natural stone combined with resins and pigments. While very durable, it is still porous enough for mineral residues to work their way into the surface. The main culprits behind mineral buildup are:

  • Hard water – Water with high mineral content like calcium and magnesium leaves behind limescale and soap scum. This appears as whitish spots and film.
  • Metal oxidation – Iron, copper and other metals can corrode and leave rusty stains.
  • Etching – Acidic foods and cleaners can eat away the resin coating and expose the natural stone underneath. This creates a rough, dull spot.

Cleaning Solutions for Removing Mineral Deposits

Removing stubborn mineral stains requires using the right cleaning solutions. Here are some effective options:


White vinegar is a mild acid that helps dissolve mineral deposits and soap scum. Mix equal parts vinegar and water in a spray bottle. Spray liberally over stained areas and let sit for 5-10 minutes before wiping away.

For tougher stains, use undiluted vinegar. Soak a cloth and leave it on the stain for up to an hour before scrubbing.

Baking Soda

Baking soda is a great abrasive cleaner for scrubbing away stains without damaging the quartz. Make a paste by mixing 3 parts baking soda with 1 part water. Apply to stained areas and let sit briefly before scrubbing with a soft cloth or sponge.

Rinse thoroughly afterwards.

Hydrogen Peroxide

Hydrogen peroxide is effective at whitening and disinfecting quartz. Mix equal parts hydrogen peroxide and water in a spray bottle. Spray over stains, let sit for 10 minutes and wipe away.

Be sure to rinse surface thoroughly afterwards.

Commercial Cleaners

Look for commercial cleaners specifically formulated for quartz and stone countertops. Many contain acids and abrasives tailored to removing mineral deposits without further damaging the surface.

Always spot test commercial cleaners on an inconspicuous area first before using over large areas. Follow label instructions closely.

Techniques for Removing Mineral Stains

Along with the right cleaning solutions, using proper techniques helps loosen and lift stains for a sparkling clean quartz surface. Follow these tips:

  • Soak stains first – Letting the cleaning solutions sit gives them time to work before scrubbing.
  • Use non-abrasive tools – Soft cloths, sponges and plastic scrapers are less likely to scratch.
  • Apply pressure – Extra elbow grease is often needed to remove stubborn buildup.
  • Scrub in circles – This prevents creating straight scratch patterns on the surface.
  • Rinse thoroughly – Remove all cleaning residue which could attract more dirt.
  • Buff dry – This brings back the quartz’s beautiful shine.
  • Repeat as needed – Heavily stained areas may require multiple applications.

Preventing Future Mineral Deposits

Prevention is key to keeping quartz free of mineral stains long-term. Try these tips:

  • Seal quartz regularly – Reapply sealant every 1-2 years per manufacturer instructions. This prevents stains from penetrating.
  • Wipe up spills quickly – Don’t let water, liquids or oils sit on the surface.
  • Use coasters under bottles and glasses.
  • Clean with quartz-safe products – Avoid acidic or abrasive cleaners.
  • Install water softener if hard water is an issue.
  • Avoid exposing quartz to strong chemicals.

With the proper care, your beautiful quartz countertops will stay looking like new for many years. Don’t hesitate to call in a professional if mineral stains prove too difficult to remove yourself.

Frequently Asked Questions

What are the most common causes of mineral deposits on quartz countertops?

The most common culprits behind mineral deposits on quartz are hard water, metal oxidation, and etching from acidic foods and cleaners. Hard water leaves behind limescale and soap scum residue. Metal corrosion can create rust stains. Acids roughen the surface exposing the natural stone underneath.

What is the safest way to clean mineral stains on quartz?

Vinegar and water is generally the safest cleaning solution for mineral deposits on quartz. The mild acetic acid in vinegar dissolves the stains without damaging the quartz surface. For tougher stains, undiluted vinegar or commercial quartz cleaners can be used by spot testing first.

Can I use baking soda to clean quartz countertops?

Yes, baking soda can be used to safely clean quartz. Make a paste with baking soda and water and apply to stained areas. Let sit briefly before gently scrubbing with a soft cloth or sponge. The abrasive texture of baking soda helps lift stains without scratching quartz. Just be sure to rinse thoroughly afterwards.

What should I avoid using to clean my quartz countertops?

Avoid any highly acidic or alkaline cleaners which can etch and damage quartz. This includes vinegar, lemon juice, bleach, ammonia, abrasive powders, and anything containing acids like hydrochloric, sulfamic or oxalic acid. Also avoid harsh scrubbing tools that could scratch the surface.

How can I prevent mineral deposits from returning to my quartz countertops?

Prevent mineral stains by sealing your quartz every 1-2 years, wiping up spills immediately, using coasters, cleaning only with quartz-safe products, and installing a water softener if you have hard water. Avoid exposing the quartz to strong chemicals which can break down the protective resin coating.


Removing mineral deposits like limescale and rust stains from quartz countertops is definitely possible with some elbow grease and the right cleaning solutions. Mild acids like vinegar, abrasives like baking soda, and commercial quartz cleaners applied with non-scratching tools are effective and safe options. Prevent future stains by sealing and properly caring for your quartz. With some periodic maintenance, quartz countertops will retain their beauty and durability for many years.