Ontario's Plain-English Guide to Custom Home Buildingπ 705-533-1633 | βοΈ 1-866-868-6606 | βοΈ info@icfhome.ca
Quartz vs. Quartzite Countertops: Same Name, Different Rock, and the One That Needs Sealing
Kitchen Countertops
Quartz vs. Quartzite: Two Counters That Share Six Letters and Not Much Else
A surprising number of people have a quartzite counter and think it is quartz, or the other way round, and find out when they put a hot pot on it or when a lemon leaves a mark. The names are the problem. One is a factory product, one is a rock, and they want different things from you.
What each one is
Quartz (engineered stone)
About 90% crushed natural quartz, 10% polyester or acrylic resin and pigment, mixed, vibrated into a mould under vacuum, cured and polished. Made in a factory, uniform from slab to slab, patterned by design. Caesarstone, Silestone, Cambria, Hanstone, Vicostone are brands of this. Non-porous, no sealing, sensitive to heat because of the resin.
Quartzite (natural stone)
Sandstone that was buried, heated and squeezed until the sand grains fused into solid quartz crystal. Quarried in blocks, sawn into slabs, polished. Every slab is different. Harder than granite, takes heat like granite, and porous enough that it needs sealing. Taj Mahal, Fantasy Brown, Super White, Macaubas, Sea Pearl are quartzites, or sold as them.
The honest problem with quartzite: some of what is sold as quartzite is actually marble or dolomitic marble with a quartzite name on it (Super White and Fantasy Brown are the usual suspects). Real quartzite will not scratch with a knife and will not fizz with vinegar. Ask the fabricator to do both tests on your slab before you pay for it.
Side by side
| Quartz | Quartzite | |
|---|---|---|
| Installed cost, Ontario | $85 to $135 per sq ft | $120 to $200 per sq ft |
| Typical 60 sq ft kitchen | $5,100 to $8,100 | $7,200 to $12,000 |
| Heat | Trivet, always. Resin scorches at about 150 C; a pan off the burner will leave a mark. | Hot pan straight on it. Same as granite. |
| Scratching | Resists normal use; a knife will scratch it. Hardness about 7 on the resin-bound surface in practice less. | Harder than a knife blade. Very hard to scratch. (A real quartzite; a mislabelled marble scratches easily.) |
| Staining | Non-porous; wipes up. Some pigments mark from strong dyes or permanent marker. | Porous; needs sealing once a year or two. Unsealed, oil and wine soak in. |
| Etching (acid) | None. | None on real quartzite. Marble sold as quartzite etches from lemon and vinegar. |
| Looks | Any pattern a factory can print: solids, speckles, marble looks. Repeats. Veining is on the surface and the edge shows a different pattern. | Natural veining, often more dramatic than marble, in white, grey, green, blue, brown. One-off. Veining goes through the slab. |
| Seams | Easy to hide on solids; harder on marble-look. | Visible; a good fabricator vein-matches. |
| Outdoors | No. UV yellows the resin. | Yes. |
| Fabrication | Standard tooling; most shops. | Hard on blades; fabrication is 20 to 40% more, and some shops decline the hardest slabs. |
| Warranty | 10 to 25 years from the brand on manufacturing defects. | None on the stone; the fabricator’s installation warranty only. |
| Resale | Expected; neutral. | Premium; buyers notice a real stone island. |
The heat thing, because it is the one that gets people
Quartz is bound with resin, and resin is a plastic. A pan at 200 C set down on quartz for a minute will leave a cloudy ring or a yellow mark that does not come out, and the brand warranty excludes it. A hot plate cooking at the table, a slow cooker with no feet, the toaster oven pushed to the back: all of them have marked a quartz counter in a kitchen somewhere in Ontario. Quartzite does not care. If you cook hard and put pans down where they land, that one line decides it.
The sealing thing, because it is the other one
Quartzite is porous enough to need an impregnating sealer, applied after install and then every one to three years depending on the stone and the sealer. It is a 20-minute job with a bottle from the fabricator: wipe on, let it sit, wipe off. A quartzite that was never re-sealed, with oil splashed by the range, gets a dark patch that is hard to lift. Quartz needs nothing. If no one in the house will ever remember to seal a counter, that line decides it the other way.
Cost, in a bit more detail
The quartz figures are on the quartz cost page. Quartzite starts about where premium quartz finishes and goes up from there, for two reasons: the slab itself ($70 to $140 supply) and the fabrication, which is slower because the stone is harder than the diamond blades like. A “quartzite” quote at $95 per foot installed is either a soft dolomite, a very plain slab, or a fabricator who has not cut it before. All three are worth asking about.
The budget move, if you want the real stone, is quartzite on the island only, and mid-tier quartz on the perimeter. That puts the one-off slab where it is seen and keeps the whole top under $8,000 on a typical kitchen. The calculator prices a split like that.
Which one, for which kitchen
- A family kitchen that gets used hard, nobody will seal anything, white counter wanted: quartz, mid-tier, and buy trivets.
- A kitchen where someone actually cooks and puts pans down hot: quartzite, or granite if the budget is tighter (quartz vs. granite covers that).
- A showpiece island: quartzite. Nothing printed looks like a 3 m slab of Taj Mahal, and the buyer in ten years will know the difference.
- Outdoor kitchen, sunroom, under a skylight: quartzite or granite. Quartz yellows.
- Rental, flip, tight budget: entry quartz, or a good laminate; laminate vs. quartz.
- A marble look without marble’s problems: both work. Quartz is the safer, cheaper, more uniform version; a white quartzite is the one that will make a designer stop talking.
Questions people ask
Is quartzite better than quartz?
For heat and for looks, yes. For stain resistance without maintenance and for price, no. They are different products for different kitchens.
Is quartzite more expensive than quartz?
Yes, by $30 to $70 per square foot installed in Ontario, which is $2,000 to $4,000 on a typical kitchen. Mostly slab cost and the slower fabrication.
Does quartzite stain?
Sealed and wiped, rarely. Unsealed, oil and red wine will soak in. Seal it after install and every one to three years.
Can you put a hot pan on quartz?
No. The resin marks at about 150 C and the warranty will not cover it. Quartzite and granite take a hot pan.
How do I know if my quartzite is real?
A steel knife should not scratch it, and a drop of vinegar should not fizz or dull the polish. If either happens it is a marble or dolomite sold under a quartzite name. Test the actual slab in the yard before it is cut.
Short version
Quartz: no sealing, no hot pans, cheaper, uniform. Quartzite: sealing, hot pans fine, dearer, one of a kind. Test the quartzite with a knife and vinegar before you pay. Then price both with the calculator.
