Nero Portoro marble is one of the most highly rated marbles. It is a black marble with a unique structure of golden veins consistently passing throughout the surface of marble. Installing Nero Portoro will instantly make the surface you install it on the focal point of your space. This marble is a great way to visually improve your home. If you are looking for a black coloured natural stone for your new countertop, backsplash or various other surfaces, Nero Portoro marble is an outstanding choice.