How to Clean Natural Stone Countertops (Granite, Marble, Quartz, and Soapstone)

Understanding Your Stone

Not all stone countertops are the same. Granite, marble, quartzite, soapstone, and engineered quartz each have different properties that determine how they should be cleaned and maintained. Using the wrong product on the wrong stone can cause etching, staining, or permanent damage.

Engineered quartz (Caesarstone, Silestone, Cambria) is technically not natural stone — it is manufactured from ground quartz and resin. It is the easiest to maintain and the most common countertop material in new Oregon homes and kitchen renovations.

Daily Cleaning

For all natural stone types, daily cleaning is simple: warm water and a few drops of pH-neutral dish soap on a soft cloth or sponge. Wipe down after cooking and eating. Dry with a clean cloth — air-drying can leave water spots, especially in Oregon areas with hard water like parts of Salem and Bend.

For engineered quartz, the same approach works. You can also use a quartz-specific cleaner or an all-purpose cleaner as long as it is pH-neutral and non-abrasive.

The key word is pH-neutral. Most natural stone (especially marble and limestone) reacts to acids and strong alkalines. Even everyday substances like lemon juice, tomato sauce, and vinegar can etch marble within minutes if not wiped up immediately.

Deep Cleaning

Monthly deep cleaning removes the buildup that daily wiping misses — residue in grout lines, around faucets, and in the texture of honed (matte) finishes.

For Granite, Quartzite, and Engineered Quartz

1. Clear the countertop completely.
2. Spray with a stone-specific cleaner or warm soapy water.
3. Wipe entire surface with a microfiber cloth.
4. For textured or honed finishes, use a soft-bristle brush to clean within the texture.
5. Rinse with clean water and dry thoroughly.

For Marble

Same process but use only pH-neutral products. No vinegar, no citrus-based cleaners, no generic all-purpose sprays. Even "natural" cleaners with citric acid can etch marble. Specialty marble cleaners are available at stone fabricators and some hardware stores in Portland and Eugene.

For Soapstone

Soapstone is the most forgiving stone. Clean with any household cleaner — it is non-porous and acid-resistant. Scratches can be buffed out with fine sandpaper (220 grit). Apply mineral oil periodically to darken the stone and maintain an even appearance.

Stain Removal by Stone Type

Oil-Based Stains (Cooking Oil, Grease, Cosmetics)

Make a poultice: mix baking soda with water (for granite/quartzite) or baking soda with hydrogen peroxide (for light-colored marble) into a thick paste. Apply over the stain about half an inch thick. Cover with plastic wrap and tape the edges. Let it sit for 24 to 48 hours. The poultice draws the oil out of the stone as it dries. Remove, rinse, and repeat if needed.

Organic Stains (Coffee, Tea, Wine, Juice)

On granite and quartzite: hydrogen peroxide (12 percent) applied to the stain for 24 hours. On marble: use the baking soda poultice method. Never use hydrogen peroxide directly on marble without testing — it can lighten some marble colors.

Etch Marks on Marble

Etch marks are dull spots caused by acid contact — they are not stains. On polished marble, a marble polishing powder and a buffing pad can restore the shine. On honed marble, etch marks are less visible because the finish is already matte. Severe etching may require professional re-honing.

Hard Water Stains

Hard water deposits leave white, crusty spots around faucets and sinks. For granite and quartz, a plastic scraper and a paste of baking soda removes most deposits. For marble, use a razor blade at a very shallow angle (this sounds risky but is standard practice) followed by marble cleaner. Our guide on removing hard water stains covers techniques for every surface.

Sealing Your Countertops

Sealing fills the microscopic pores in natural stone and prevents liquids from penetrating and staining. Engineered quartz and soapstone do not need sealing.

How to Test If Your Stone Needs Sealing

Place a few drops of water on the countertop surface. Wait 10 to 15 minutes. If the water has absorbed (the spot is darker), the stone needs sealing. If the water still beads on the surface, the existing seal is still effective.

How to Seal

1. Clean the countertop thoroughly and let it dry completely.
2. Apply a stone-specific impregnating sealer according to the product directions. Spray or wipe an even coat.
3. Let it dwell for the recommended time (usually 10 to 20 minutes).
4. Buff off any excess with a dry cloth.
5. Let the sealer cure for 24 hours before exposing to water.

A bottle of quality stone sealer costs $15 to $30 and covers most kitchen countertops. The process takes about 30 minutes and should be done annually for granite and every six to twelve months for marble.

What to Avoid

• Vinegar, lemon juice, or any acidic cleaner — etches marble, travertine, and limestone on contact
• Bleach — can discolor stone and break down sealers
• Abrasive pads or powders — scratch polished surfaces
• Generic all-purpose cleaners — many contain acids or alkalis that damage stone over time
• Sitting on countertops — concentrated weight on unsupported stone can cause cracks, especially at seams
• Placing hot pots directly on stone — thermal shock can crack granite and quartz. Always use trivets.

Professional Maintenance

Professional stone restoration can fix damage that home methods cannot — deep stains, severe etching, scratches, and dull finishes. Stone fabricators in Portland, Salem, and Eugene offer restoration services that include grinding, honing, and polishing.

For routine cleaning that includes proper countertop care, professional residential cleaning services trained in natural stone maintenance use the right products and techniques. If you are upgrading your kitchen cleaning routine, our kitchen deep clean guide covers every surface including countertops.