Even millions of years ago, when granite and marble began to form deep within the earth in their incipient stages, the processes which created them were notably different.
Granite is a plutonic igneous rock; this means that, at some point in its formation, it melted. It differs from lava in that this molten stone never made it to the surface but remained trapped within the earth, where it slowly cooled, crystallised and built up into an exceptionally uniform, speckled stone with colours ranging from black and grey to pink, brown, red, green and white.
Marble is a metamorphic stone and at one time, was limestone. Over time, a combination of great heat and pressure caused it to recrystallize. Foreign deposits became incorporated into the stone during this process, leaving an incredible multiplicity of colours, textures and veining. No stone is like any other.