Siena marble is a type of Italian marble that has been used since ancient Roman times. It is a beige or yellowish-brown color with fine, sometimes irregular, veins of darker brown or red. However, there are several other names and synonyms for this type of marble including Siena Brocatelle, Broccatello di Siena, and Siena Yellow Marble. Other popular synonyms for Siena marble include Crema Siena Marble, Siena Fiorito Marble, and Pietra Siena Marble. Each of these variations has their unique color, pattern, and appearance, and they have been used worldwide in many architectural and decorative applications.