Since antiquity we find Porto Marble among the imperial villas of ancient Rome, and also it was largely used in the most luxurious buildings of the Renaissance, in the Roman churches and also in the magnificent European palaces of the nineteenth century. Portoro Marble has been used mainly in Belgium, Switzerland and France, where it has been employed in Versailles. A fundamental feature of Portoro marble, in addition to its gold veins, is the background color that has to be as much dark as possible attaining a “black sepia color”, which is typical of all our material and definitely changes its optical effect during polishing and installation. Portoro marble has been used for centuries in all the processes of the highest level and in ultra-luxury finishes. We find it in the most beautiful Italian palaces.