Over and above its indisputable, historical and ethical value, natural stone, by definition, conserves a characteristic that other synthetic or partially artificial products do not possess, the green ingredient. Increasing numbers of products are being erroneously labelled as “natural” misinterpreting the deeper meaning of the term, which has a completely ecological connotation. Contrary to buildings constructed with synthetic materials, architecture realized with natural stone the point of arrival of an entirely ecological path of development, which starts with the phase of extraction of the raw material, continuing with processing and winding up with its installation.