Quartz durability: stains, scratches and heat — what you really need to know

Quartz countertops have a reputation for being indestructible. The reality is more nuanced: it is exceptionally resistant to stains and scratches, but it has one well-known weak point — heat. Here is what quartz can really take, what can damage it, and the habits that keep it looking beautiful for decades. The short version: stains: almost never; scratches: rarely; heat: be careful.

What quartz can really handle

A quartz countertop is made of ground quartz — about 90% of its mass — bound with polymer resins. Quartz, the mineral, rates around 7 on the Mohs scale: harder than kitchen-knife steel, in the same league as granite. And unlike granite, the surface is non-porous: no liquid penetrates it, no bacteria take hold, and it never needs sealing.

In plain terms: the daily wear of a kitchen — knives, glasses, spilled juice, dishes set down a little too fast — barely affects it. Its two real enemies are more specific: strong acids left in prolonged contact with the resin, and the concentrated heat of a pot straight off the stove. Those are what the next three sections cover.

Stains: what stains and what doesn't

Stain resistance is where quartz is strongest. The non-porous surface lets nothing penetrate: wine, coffee, tea, oil and tomato sauce wipe away without a trace, even if you don't wipe them up right away. No resealing, no oil stain setting in — unlike granite.

The real stain risks

• Acids: lemon juice, vinegar, heavy-duty cleaners. Left for a few hours, they attack the resin and can leave a dull mark. A quick wipe takes care of it.
• Very powerful dyes (ink, certain spices) left to dry for several days on a light surface.
• Heat, which browns the resin rather than “staining” it — see the heat section below.

What to avoid at all costs

Two products are banned, even diluted: bleach and vinegar, along with any abrasive or high-pH cleaner (stripper, steel wool). They don't clean quartz any better — they damage the resin that binds it. For a stubborn stain, a mild pH-neutral cleaner or a bit of dish soap is enough. The product-by-product detail is in our guide how to clean a quartz countertop.

Scratches: the knife loses, not the countertop

At around 7 on the Mohs scale, quartz barely scratches. The proof in daily use: cutting directly on the countertop barely marks the surface — it's the blade that goes dull. A cutting board is still recommended — but to protect your knives, not the countertop.

Two exceptions remain. Ceramic knives, which are harder, can leave a grey mark: it's often a deposit of material on the surface, which comes off with a soft cloth and a mild cleaner. And very hard particles (sand, gravel tracked in by winter boots) trapped under a dish can scratch any surface — a quick wipe before setting things down is enough.

A word on finishes: on polished quartz, everyday micro-scratches are almost invisible; on a matte finish, marks and water rings show more — matte forgives neglected upkeep less, but hides fingerprints better. If your countertop shows a surface scratch or has lost its lustre, our guide how to polish a quartz countertop explains when a polisher can fix it.

Heat: quartz's real weak point

Quartz withstands heat less well than granite. Why? Because about 10% of its mass is a polymer resin, which softens and browns under concentrated heat. In practice: a coffee cup, a soup bowl or a warm plate set on the countertop is no problem. What demands a trivet is the pot or pan straight off the burner or out of the oven.

The concrete risk is a browning or whitish haze in the resin, and it's permanent. The darker the quartz, the more the mark shows: that's why, for a black colour, our team recommends granite or Dekton rather than quartz. Also note: no manufacturer warranty (Silestone, Caesarstone, Vicostone) covers heat damage — it's classified as misuse. Granite, a 100% natural stone with no resin, handles hot dishes without a problem, and Dekton, a sintered stone also without resin, tolerates heat like no quartz can. For dark colours, here are the models we install:

Cambrian Black (fini antique)Granit

Black Pearl poliGranit

KelyaDekton

See dark countertops in the catalogue →

All the details on temperatures and the right habits: can you put hot items on a quartz countertop?

Quartz, granite or Dekton: the three-way comparison

Durability isn't a single-axis contest. Here's how the three materials we fabricate and install compare on the questions that matter day to day.

Quartz in a house with kids

That's where it's strongest. Speckled patterns — stippled grain, light veining — hide crumbs, fingerprints and the little morning oversights: the countertop doesn't need buffing to look clean. The non-porous surface is also the most hygienic of the three: nothing penetrates it, and one wipe after packing lunches is enough. And no chemical sealer to reapply means one less product in a house where kids touch everything.

The one habit to teach early: the trivet. A pot rest near the stove, and heat drops off the worry list.

The right material for your kitchen

Quartz runs between $60 and $110 per sq. ft. installed in Quebec (median $75) — the project's surface area is the first price factor, and under 20 sq. ft. it goes up. Granite is comparably priced, and Dekton sits a notch above. Every project is quoted individually, and the installation lead time is 14 days after measurement. To see real samples in your kitchen, free and with no obligation — our team comes to you:

To go further: see prices by material and the sample invoice for a full kitchen, or request a free quote in 7 questions — reply within one business day.