THE RARER KINDS OF STONE MENTIONED BY VASARI.
A, Egyptian Porphyry. A1, Portion of the same piece that has passed through the fire. B, Dark green porphyritic stone, incorrectly called “Serpentine.” C, D, Two specimens of Breccias of Seravezza (Stazzema). E, “Verde di Prato,” a true Serpentine. F, F, Red Marble or Limestone from Monsummano, near Pistoja, as used on the Duomo and Campanile, Florence. G, Pietra Serena. H, Cipollino. I, True Touchstone or Basanite. J, White Statuary Marble from Monte Altissimo. K, Bardiglio, or Grey Marble, from La Cappella, near Seravezza. L, Istrian Stone. M, Pietra Forte. N, Do. from Fortezza, Florence. O, Travertine. P, So-called “Paragone,” a grey marble with lighter veins. Q, Peperino, from Rome.