Why Natural Stone Shines | Phoenix & Arizona
Why Your Stone Shines: It’s Not What You Think
At Beyond Stone Solutions, we find that many homeowners and even commercial maintenance technicians in the Phoenix & Arizona area believe the shine on marble, granite, limestone, and other natural stone comes from wax, a sealer, or some kind of clear coating. That’s a reasonable assumption. After all, wax makes a car shine, and polyurethane gives wood floors a glossy finish…
Natural stone is different.
In most cases, the shine you see isn’t something sitting on top of the stone. It comes from the stone itself.
The Shine Is Created by Polishing
When natural stone is polished, it’s ground with a series of increasingly fine diamond abrasives. Each step removes the scratches left by the previous step until the surface becomes extremely smooth.
A rough stone surface scatters light in different directions, making it appear dull. A highly polished surface reflects light more evenly, producing the clear, mirror-like shine people associate with polished marble and granite.
Think of it like sanding a piece of glass. As the scratches become finer and finer, the surface becomes smoother and more reflective. Nothing has to be painted or sprayed onto it to create that reflection.
With marble, travertine, and some limestone, the last polishing step may also involve a polishing powder. This produces a controlled reaction at the surface that helps develop the stone’s clarity and shine. It still isn’t wax. The polish becomes part of the stone’s surface rather than a coating sitting on top.
Does Sealer Make Stone Shine?
Usually, no.
A properly selected penetrating sealer soaks into the stone and helps reduce its ability to absorb liquids. It shouldn’t form a visible film or noticeably change the appearance of the stone.
A sealer may make the color look slightly richer while it’s wet or during application, but that doesn’t mean the sealer created the original shine. Once cured, most penetrating sealers are nearly invisible.
There are color-enhancing sealers that intentionally deepen the stone’s color, but even these aren’t responsible for producing a true factory-polished finish.
If someone tells you that your dull marble only needs another coat of sealer to restore its shine, be careful. Sealer won’t repair scratches, etching, wear, or an improperly finished surface.
Why Does Polished Stone Become Dull?
Since the shine is part of the stone’s surface, anything that damages or scratches that surface can reduce the reflection.
Common causes include:
- Sand, grit, and dirt tracked across a stone floor
- Acidic liquids such as lemon juice, vinegar, wine, and some bathroom cleaners
- Abrasive cleaning powders or scrub pads
- Improper cleaning chemicals
- Heavy foot traffic
- Residue from too much cleaner
- Wax, acrylic finishes, or other coatings applied over the stone
Marble and limestone are especially sensitive to acids. When an acidic substance touches the surface, it can chemically attack the stone and leave a dull spot. This is called etching.
An etch mark is often mistaken for a stain, but the two are different. A stain is material that has entered the stone and caused discoloration. An etch is physical damage to the polished surface. Applying sealer over an etch won’t make it disappear.
What About Wax?
Wax is sometimes applied to stone, especially in older maintenance programs or as a quick way to hide a worn finish. It may create temporary gloss, but it isn’t the stone’s true polish.
Wax and other topical coatings can create their own problems. They may attract dirt, develop traffic patterns, turn yellow, trap moisture, or require frequent stripping and reapplication. They can also make future restoration more difficult.
A properly polished stone surface generally shouldn’t need wax to shine.
Can the Natural Shine Be Restored?
In many cases, yes.
If the stone has become scratched, etched, or worn, a qualified stone restoration professional can usually refinish it. Depending on the condition, this might involve diamond honing, polishing, or both.
The goal isn’t to cover the damage with a shiny product. It’s to correct the surface of the stone so it can reflect light properly again.
This is also why homeowners should be cautious with products labeled “stone polish.” Some are simply cleaners. Others leave behind oils, silicones, or temporary coatings that make the surface look better for a short time without actually restoring the stone.
Not Every Stone Is Supposed to Be Shiny
Natural stone can be finished in several ways. A polished finish is glossy and reflective. A honed finish is smooth but has a softer, matte appearance. Brushed, leathered, flamed, and textured finishes have even less reflection.
A honed stone isn’t necessarily damaged just because it doesn’t shine. That may be the finish it was designed to have.
Before trying to make a stone surface shinier, determine what type of stone it is and what finish was originally intended. Putting wax or a glossy coating on honed stone can change its appearance and create an ongoing maintenance headache.
Keep the Shine Where It Belongs
Use a neutral cleaner made for natural stone. Keep sand and grit off floors with walk-off mats and regular dust mopping. Avoid vinegar, lemon-based cleaners, harsh bathroom chemicals, scouring powders, and abrasive pads.
Refer to our Stone and Tile Care Guide in our Caring For™ It section for more information, including Do’s and Don’ts on caring for your natural stone.
If the stone becomes dull, find out why before applying another product. It may simply have cleaner residue on it, or it may need professional refinishing.
The beautiful shine on polished natural stone isn’t supposed to come from wax, plastic, or a bottle of miracle polish. It comes from the stone’s own surface, carefully ground and polished until it reflects light.
That’s one of the things that makes natural stone so special. Its beauty doesn’t need to be painted on.
If you have questions about your natural stone, please don’t hesitate to reach out to us.
By Fred Hueston. This article is one of a series of Caring For It™ articles written and published on behalf of Surface Care PRO Partners.