One of the most valuable marbles: Covelano Macchia Vacchia. With thick waves of black over a dusty white background, Covelano Macchia Vacchia is a highly sought after stone due to its mesmerizing appearance. Accompanying its monochromatic shades, thin reddish brown veins add a sense of warmth to this stone. A stone with a strong personality, Covelano Macchia Vacchia looks stunning when used in furniture design, fireplaces, and wall & floor panels.