| They played up the contrast between plastered surfaces and the peperino stone in the footings, projecting windowsills, and coping. |
| Built of uniformly gray, granular volcanic tufa, or peperino, the courtyard was completed by 1579, as recorded in the building documents. |
| Peperino tuff is best known as building stone heavily utilized by the ancient Romans. |
| Upon the oyster bed, again, is superimposed a second mass of lava, together with tuff or peperino. |
| The peperino, much used at Rome and Naples as a building stone, is a trachyte tuff. |
| Peperino shows a brilliant ruby red color and nuances of ruby red, moderate transparency. |
