 limestone is a kind of sedimentary rock and marble is a kind of metamorphic rock & sedimentary rocks are formed by deposition / cementation and metamorphic rocks are formed by rocks being exposed to extreme heat and pressure -> elevation is a mean of sedimentary stone that is formed by sublimation / cementation and strength is a mean of metamorphic stone that is formed by grey being exposed to middle light and external limestone is a kind of sedimentary rock that is formed by deposition / cementation and marble is a kind of metamorphic rock that is formed by rocks being exposed to extreme heat and pressure