Granite or Marble? Differences in Honing and Maintenance

In short: Many homeowners don't know whether their floor is granite or marble, because when polished, both look shiny and elegant.

Yet these two stones behave very differently, from hardness and acid resistance to polishing time and daily care. In this article, we explain the differences in plain language and share some simple observations you can make at home.

The Origin of the Two Stones

Marbleis a metamorphic stone formed when limestone recrystallizes deep underground under heat and pressure. Its main mineral is calcite.

Granite is an igneous stone formed when magma cools slowly inside the earth's crust. It consists of minerals such as quartz, feldspar and mica.

This difference determines the entire behavior of the two stones.

Telling Them Apart by Appearance

Although the two stones look alike when polished, they can often be told apart by looking carefully at the pattern on the surface.

• Marble: It is usually veined; the veins run as flowing lines or cloud-like transitions, and the color is often spread throughout the whole stone.
• Granite: It is usually speckled or grainy; mineral grains of different colors appear interlocked, and black, gray, pink and brown tones are common.

However, some granites can look veined and some marbles can look speckled. Commercial names can also be confusing; some stones sold on the market as "granite" are actually other types.

Simple Observations at Home

It is possible to get a first idea of the type of stone at home with a few simple observations that cause no damage.

• Acid test (in an inconspicuous corner): Drop a single drop of vinegar, wait a minute, then wipe it off; if a dull mark remains, it is most likely marble, while granite is usually unaffected. Since the test leaves a mark on marble, it should only be done in an unnoticeable spot.
• Scratch observation: Granite is very resistant to ordinary steel; marble, being softer, is scratched more easily by hard objects such as keys or knives.
• Where it is used: Granite is very common on kitchen countertops and outdoor steps; marble is more often found on living room and bathroom floors.

For a definitive identification, an expert's eye is the most reliable.

Hardness and Scratching

Granite is much harder than marble. Therefore:

• Scratches later: In daily use it scratches and dulls later; sand and foot traffic leave marks on granite much more slowly than on marble.
• Longer polishing: But when it is scratched or dulled, polishing takes much longer, because each step requires more passes on the hard surface.
• Abrasives wear out quickly: Abrasives wear out faster on granite; more pads and segments are used for the same area than for marble.

Marble, on the other hand, is softer; it scratches more easily but is also easier to polish and buff.

Acid Resistance

Marble is sensitive to acids; lemon, vinegar, cola and limescale removers leave dull marks on its surface. The vast majority of granites are not affected by such acids. This difference is especially decisive in kitchens and bathrooms.

Porosity and Stains

The porosity of granites varies by type. Some light-colored granites can absorb oil and water and darken; dark, tightly structured granites hardly absorb at all. Marble also shows different absorbency depending on its type. For both stones, the need for impregnation is determined with a drop test.

Differences in Polishing

For granite, polishing is usually considered only if the existing shine is completely lost or there are deep scratches. For slight dulling, cleaning the film, residue or old sealers on the surface is tried first; often the "dullness" of granite is a problem of the residue on it, not the stone.

Differences in Daily Care

Although the daily care of the two stones looks similar, their reactions to acid, heat and chemicals differ.

• pH-neutral cleaners: For both, pH-neutral cleaners are the safest choice; they remove dirt without abrading the stone or the sealer on it.
• Stay away from acidic products: Acidic products must never be used on marble, as they leave dull marks on the surface; they are also not recommended for granite because they can damage the sealer.
• Hot pots and heat: Granite withstands a hot pot in the kitchen better than marble; even so, sudden temperature changes and a constant heat source are not recommended.
• Removing sand and dust: On both stones, sand and dust should be removed regularly; sand dragged underfoot will dull both surfaces over time.

Two Stones in the Same Home

In many homes the two stones are found together: a granite kitchen countertop with a marble floor, or granite entrance steps with a marble living room. In this case, the most common mistake is treating both stones with the same product and in the same way. A limescale remover that causes no problem on a granite countertop leaves a dull mark when it drips onto the marble floor just below. A polish recommended for granite, on the other hand, can leave a film on the surface of marble. If you have two stones at home, the easiest solution is to choose a pH-neutral cleaner that can be used safely on both as a shared product.

Correctly Identifying the Stone Before Honing

How accurately the team that comes for the honing identifies the stone directly affects the result of the job. A step plan suited to marble falls short on granite; an aggressive start suited to granite removes more material than necessary from a soft marble. That is why, during the survey:

• Structure and broken edges: The structure of the stone (veined or grainy) and its broken edges are examined; the inner texture visible at an edge gives clearer information about the type of stone than the surface does.
• Test honing: A small test honing is done on a hidden corner; the stone's reaction to the abrasive shows where the step plan should begin.
• Old polish and coatings: We check whether any polish, resin or coating has previously been applied to the stone; these layers change the first step and the duration of the honing.
• Areas in contact with acid: The behavior of areas that come into contact with acid is observed; if there are dull marks, the stone most likely contains calcite and is treated like marble.

Some stones sold on the market under the name marble or granite may be of other types; for example, some hard limestones are called marble and some quartzites are called granite. It is necessary to work according to the stone's actual behavior rather than its commercial name.

A Short Comparison to Help You Decide

In homes in Alanya, marble is preferred more in living rooms, bedrooms and bathrooms, while granite is preferred for kitchen countertops, stairs, housing complex entrances and hotel lobbies. Both stones can be used for decades with proper care; what matters is knowing which one you live with and treating it accordingly.