How to Care for Natural Stone Countertops (Granite, Marble & More)

First, Know What Kind of Stone You Have

Not all natural stone is the same, and this matters more than most people realize. Stone generally falls into two camps:

• Siliceous (silicate-based) stone — like granite, quartzite, and slate — is harder and more resistant to acids. It's the more durable, forgiving group.
• Calcareous (calcite-based) stone — like marble, travertine, limestone, and onyx — is softer and reacts to acids. These stones are stunning, but they need a gentler touch.

The difference comes down to chemistry: calcite-based stones react with acids, which is why marble can be damaged by something as everyday as a splash of lemon juice or a glass of wine. Granite, being silicate-based, shrugs most of that off. Knowing which group your countertop belongs to tells you how careful you need to be.

Daily Cleaning: Keep It Simple

For everyday cleaning, less is more:

• Wipe with a soft cloth or sponge and warm water.
• Add a few drops of mild dish soap or a pH-neutral stone cleaner for anything sticky.
• Dry with a clean microfiber cloth to avoid water spots and streaks.

That's genuinely all most surfaces need day to day. The key is being consistent — wiping up as you go prevents the buildup and spills that cause real problems.

What to Avoid (This Is the Important Part)

More stone gets damaged by the wrong cleaning products than by anything else. Steer clear of:

• Acidic cleaners — anything with vinegar, lemon, or other citrus. These can etch and dull the surface, especially on marble and other calcite-based stones.
• Bleach and ammonia — harsh and can break down sealers over time.
• Abrasive pads and powders — scouring pads and gritty cleansers will scratch the polish right off.
• Generic "all-purpose" sprays — many contain ingredients that aren't stone-safe. When in doubt, use a cleaner made specifically for natural stone.

A simple rule: if a product doesn't say it's safe for natural stone, don't use it on your countertops.

Understand Sealing

Most natural stone is porous, which means it can absorb liquids if left unsealed — and that's how stains happen. Sealing fills those microscopic pores and buys you time to wipe up spills before they soak in.

How often should you seal? It depends on the stone and how heavily the surface is used. Granite is often resealed about once a year, while more porous or softer stones may need it more frequently. Some premium sealers last considerably longer.

The water test: Want to know if it's time? Pour a small amount of water on the counter and wait about 15 minutes. If the water beads up, your seal is doing its job. If it soaks in and leaves a dark spot, it's time to reseal.

Sealing is a quick DIY job with a quality stone sealer, but if you'd rather not deal with it, a professional can handle it fast.

Handling Spills and Stains

The single best habit you can build: blot spills, don't wipe them. Wiping spreads a spill across more surface area; blotting lifts it. Get to spills quickly, especially acidic ones (wine, citrus, tomato, coffee) on marble and other sensitive stones.

If a stain does set in, don't panic — many can still be drawn out. Oil-based and organic stains often respond to a poultice, a paste that sits on the stain and pulls it up out of the stone as it dries. For stubborn or valuable surfaces, it's worth calling a stone professional rather than experimenting with harsh chemicals.

A Special Note on Marble (and Etching vs. Staining)

Marble owners run into a specific issue worth understanding: etching is not the same as staining.

• A stain is discoloration — something absorbed into the stone.
• Etching is a chemical reaction that dulls or roughens the surface where an acid touched it, leaving a faint, lighter mark even after cleaning.

Sealing helps prevent staining, but it does not prevent etching. The only real protection against etching is keeping acids off the surface in the first place. That's why marble works beautifully in some kitchens and frustrates owners in others — it rewards careful habits. Use cutting boards, wipe acidic spills immediately, and many people embrace a little patina as part of marble's character.

Everyday Habits That Protect Your Stone

A few small routines go a long way:

• Use cutting boards. Never cut directly on the stone — it dulls your knives and can scratch softer surfaces.
• Use trivets and hot pads. Even heat-tolerant granite benefits from protection, and it's a must for stones that are more sensitive.
• Use coasters under glasses, bottles, and anything that might leave a ring — especially acidic or alcoholic drinks.
• Clean as you go rather than letting spills sit.

None of these are demanding. They just become second nature.

When to Call a Professional

Some things are worth handing off: deep stains that won't lift, etched marble that needs polishing, chips or cracks, or a full reseal you'd rather not tackle yourself. A stone professional has the right products and techniques to restore your surface without risking further damage.

At Granite Guys, we don't just fabricate and install beautiful countertops — we help you keep them that way. We are here to give advice with any questions you might have. Reach out anytime and we'll make sure your investment keeps looking its best.