Is there a difference between marble and granite?
Both marble and granite are quarried, cut, and formed directly into tiles. However, they differ on many levels. For instance, granite is and igneous stone. That is, it is formed from molten lava. Granite, comprised of crystallized minerals, is extremely hard. So hard, in fact, that it would dull your knives if you used the surface as a cutting board. Marble, on the other hand, begins its evolution as sediment. It is comprised mainly of silt, animal skeletons, shells, and plant matter. Over millions of years, this sediment solidifies into what we term marble. Because its main component is calcium, it can be affected by acids such as vinegar and citrus beverages.

Should I use marble or granite in my kitchen?
Granite is a more durable stone; therefore, it is advisable that it be used in the kitchen. Granite is also impervious to heat. You could place a hot pan on it to no ill effect.
Marble is far easier to scratch and is affected by acidic substances, such as ketchup. These acidic substances cause a chemical reaction which will remove the polish. However, with proper precautions, such as diligent sealing, marble may be used in the kitchen. The ancient Greeks used marble extensively in all areas of their homes.

Is it necessary to seal stone?
Marble and stone are minerals and, as such, are porous. In other words, they may absorb liquids, which can result in staining. After installation, marble and granite surfaces are sealed in order to clog the pores and prevent everyday spills from staining them. However, time may remove the seal, making it necessary to reapply. Granite is far more stain-resistant than marble.

What is the best way to clean marble and other stones?
Don’t use anything you wouldn’t consider safe to clean your hands with. For instance, you would’t clean your hands with an abrasive powder or cleanser. Further, never use any product which is acidic, such as glass-cleaner type products. Use cleaning products specifically designed for marble and granite.

Can my granite top be damaged?
It cannot be damaged through normal living. Neither knives nor hot items, such as pots and pans, will affect it. However, like any solid surface, high impact blows have the potential to harm granite. Because of its crystalline structure, it can chip if subjected to sharp hard objects. In the event of severe abuse, a chip can be filled with a granite dust and epoxy mixture. Additionally, if left unsealed, granite can absorb stains such as oil, which can ultimately cause dark spots or discoloration. Heat from pots and pans or burning liquids will not affect granite under normal circumstances.

Does granite stain?
As a general rule: no. Granite is very dense. On some colors, moisture may penetrate if left for a long time on the counter, but any dark spots will dry and disappear.