Pietra Grey Marble has background colour of greyish-black together with some white veins on the surface. It is considered one of the most famous marbles. This marble is also internationally well-known and has been given different names such as Gregiro marble, Grafite marble and Graphite Marble.

This marble is used mostly in kitchen and bathrooms in mosaic format and also lobby, floor of restaurant, stair, façade, exterior and interior designs, and public places to a large extent.