This is a Procedural Marble Tiles Material that is based on the Marbel Shader by Remington Graphics. It uses adaptive Subsurf for the displacement. I made it white where it was Black and Orange originaly and added a Slider for "Worm Trails" and "Dot Strenght". You actually dont have to give me credit, but you should do for Remington Graphics. The displacement looks sometimes wrong in the viewport but it works properly in the render.
Great...