Marble is a metaphoric stone, which means that it is a rock that changes composition over time from one rock to another. Limestone or dolomite are softened over time under conditions of intense heat and pressure and then are recrystallized as marble.
Marble is composed of calcite, aragonite and dolomite crystals. and is found in many countries such as Belguim, France, Great Britian, Greece, Italy, India and Spain..
Marbles have similar characteristics to limestones and are typically used for the same applications, though, marbles are almost always more aesthetically valuable and available in much wider range of colors.
Marble is known to be softer than granite.