Marble Etching vs. Staining: What's the Difference?
Published •6 min read
If you have marble countertops, you'll eventually see marks, and it helps to know which kind. Etching is a dull or lighter spot where an acid has reacted with the marble's surface. Staining is a darker (or colored) spot where a liquid has soaked into the stone. They have different causes, and sealing helps with only one of them.
Etching vs. Staining at a Glance
| Etching | Staining | |
|---|---|---|
| What it looks like | Dull, lighter or rough spot; can look like a burn mark | Darker or colored spot |
| Cause | Acids reacting with the calcium in marble | Liquids such as wine or oil soaking in |
| Common culprits | Lemon, other citrus, tomatoes, vinegar, juice, wine, alcohol | Red wine, oil |
| Does sealing help? | No; sealing doesn't stop etching | Yes; sealing slows absorption |
| Prevention | Keep acids off; use boards, coasters and trays | Wipe spills quickly; keep the stone sealed |
What Etching Is
Marble is a calcium-based stone. As stone restoration experts quoted by the Natural Stone Institute explain, when marble comes into contact with anything acidic it can etch, which looks like a dull spot or burn mark. Common kitchen acids include tomatoes, citrus fruits, juices, alcohol and vinegar. Etching is a change in the surface itself, so a sealer, which works by slowing absorption, doesn't prevent it.
What Staining Is
A stain happens when a liquid soaks into the stone. The experts name red wine and oil as two of the biggest culprits. One notes that red wine wiped up immediately usually won't stain, but if it's left, it will, and that its acids may still etch the surface. They add that most stains can be drawn out during professional restoration.
How to Prevent Both
- Use cutting boards, trivets and coasters religiously; one expert recommends large boards next to the sink and the stove.
- Wipe spills immediately, especially wine, juice and oil.
- Clean daily with a mild cleaner made for stone. Read labels carefully and avoid anything acidic.
- Keep the stone sealed. The experts note sealers vary widely, from about six months to more than ten years, so follow the sealer manufacturer's guidance.
- Use trays for oils, vinegars and citrus kept on the counter.
What to Do If It Happens
For stains, the experts note that most can be drawn out during professional restoration. For etching, the surface itself needs attention, which is why marble is periodically refinished; one expert quoted by the Natural Stone Institute suggests polished marble may need refinishing every two to three years and honed marble every three to five. A stone restoration professional can assess both. Many homeowners also choose to accept light etching as part of marble's natural patina.
Is Marble Right for Your Kitchen?
If etching would bother you, consider marble-look quartz or genuine quartzite, which resists everyday acids. See marble vs. quartz, marble vs. granite and quartz that looks like marble.
Frequently Asked Questions
What is the difference between etching and staining on marble?
Etching is a dull or lighter spot caused by acids reacting with the marble's surface. Staining is a darker spot caused by a liquid, such as wine or oil, soaking into the stone.
Does sealing marble prevent etching?
No. Sealing slows staining by reducing absorption, but it doesn't stop acids from etching the surface.
Can etching be removed from marble?
Etching changes the surface, so it's addressed by professional refinishing. A stone restoration professional can assess it.
What causes marble to etch?
Acids such as citrus, tomatoes, vinegar, juice, wine and alcohol.
Choosing Countertops? Get a Quote from Mega Solutions
Mega Solutions installs marble, quartz, quartzite and granite countertops, and also sells and installs cabinets. Request a personalized quote based on your measurements and the stones you're considering.
Sources
- Natural Stone Institute, "How to Care for Your Marble Countertops": usenaturalstone.org
- Natural Stone Institute, "The Definitive Guide to Quartzite": usenaturalstone.org
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