Natural stone is a great option for counter tops in kitchen, bathrooms or fireplaces. Granite and Marble are natural products which are composed of various minerals. They are formed under metamorphic pressure giving each martial its unique and beautiful color and veining characteristics. Granites have been formed over millions of years and marble is more commonly formed over tens of thousands of years. Granites are extremely hard materials made primarily from igneous rock (volcanic) and therefore are extremely resistant to acids in the kitchen, hot objects, scratching from kitchen knives and fading of color.
Marble is much more fragile than Granite. Marble is primarily formed from calcium and is less dense than granite therefore making it more susceptible to acid etching of the polish. It is best not used in kitchen application.
All natural stone products are porous to varying degrees. It is strongly suggested to seal all natural stone with a penetrating sealer closing off the pores at least temporarily then resealing over time. This will dramatically help repel damaging contaminates like fruit juices, sodas, perfumes, fatty foods, oils, etc. Marble especially stains when exposed to oils.