A cloudy ring where a glass sat or a dark patch next to the cooktop can look like something you just need to clean. But on marble, those marks can mean two different things. A stain changes the stone’s colour. An etch mark changes its finish. Knowing which one you’re looking at helps you avoid treating the wrong problem.
What does an etch mark look like?
Etching happens when an acidic substance, such as lemon juice or vinegar, reacts with the marble. It often leaves a dull or cloudy patch that stands out when light hits the benchtop from the side. On polished marble, you might notice that a reflection looks sharp across most of the surface but hazy where the spill occurred.
An etch mark isn’t dirt. A pH-neutral stone cleaner can remove residue, but it won’t bring back a finish that’s been etched. For suitable surfaces, we use diamond honing and, where needed, polishing to blend the affected area with the surrounding stone.
What does a stain look like?
A stain usually shows up as discolouration. For example, oil can leave a darker patch near a cooktop. If the colour has changed but the area still reflects light much like the surrounding stone, that’s a clue it may be a stain.
It’s also possible to have both. A wine spill can leave colour behind and dull the finish in the same spot. That’s why we check the surface before recommending stain treatment, honing, or a combination of the two. Deep stains may not come out completely.
What to do before trying another cleaner
Blot fresh spills promptly and clean the area gently with a pH-neutral product made for natural stone. Once it’s dry, look at the mark from a low angle in daylight. If the colour looks similar but the sheen changes, it may be etching. If the colour is different even when viewed straight on, it may be staining.
Avoid vinegar, acidic cleaners and abrasive pads. They can change the finish and make the affected area more noticeable. A penetrating sealer can help reduce absorption and staining, but it won’t prevent acid etching.
Before and after a kitchen benchtop restoration
The photos below show the same dark stone benchtop before and after restoration. Look at the area around the sink and how the light reflects across the surface. That wider view helps show the difference in finish, even when an individual mark is hard to identify from a photo.
Not sure what’s marking your marble?
Send us a close-up of the mark and a wider photo of the whole benchtop. If you know what spilled or which cleaning products you’ve already tried, tell us that too. We can give you an initial idea of what may be possible and let you know if an on-site assessment is needed.