Polychromy of Roman Marble Sculpture – The Metropolitan Museum of Art https://www.metmuseum.org/essays/polychromy-of-roman-marble-sculpture
Some marble sculptures were completely painted and gilded, effectively obscuring the marble surface; others had more limited, selective polychromy used to emphasize details such as the hair, eyes, and lips and accompanying attributes.
40 BCE Marble head of an elderly woman Roman ca. 40–20 BCE Terracotta column-krater