Marble is a metamorphic rock, which means it used to be limestone before it became marble. It is often used in sculptures and other works of art because it is easy to work with. Also it is not as soft as limestone, but not as hard as granite. It also has a beautiful patina that is quite unique. Using it in classical sculpture has made it a symbol of taste and refinement. Sculptors still like to work with marble today.
Marble is the favored stone of architects in ancient Greece and Rome as well because carves easily without shattering. It reflects light in a distinct way due to calcite, which has a low refraction index. This gives marble a waxy glow.
Marble is used for industrial applications as well. Crush marble mixed with other materials creates aggregates used in building foundations, railroad beds, and highways, Pure white marble is used in crushed form in plastic, paint, putty, grout, paper, whitewash, and even cosmetics as a filler and whiting.
Marble is durable enough for use as a dimension stone. It works very well in kitchen and bathroom vanity countertops with the proper sealing, and since it is not as rigid as granite, it works very well as fireplace surrounds.