NPT STMSF24 2" x 4" Travertine Splitface Mosaic Silver. The natural beauty of Travertine makes it ideal for any outdoor space. Whether creating a patio, a walkway, or a pool deck, Travertine’s rich tones and inherent shade variations will add warmth and sophistication to any setting. Rich Silver Travertine brings together the best of both beige and gray tones.