Proline Decorative Concrete Systems TTR2000B 36" x 36" Tumbled Travertine Ashlar Versailles B Concrete Stamp. This beautiful pattern combines Prolines new Tumbled Travertine texture with the ever popular Ashlar layout. This earthy texture can be grouted for a customized appearance. The recessed grout lines make a perfect canvas for antiqued only, non sealed surfaces, such as pool decks. Check out our new Tumbled Travertine section for more selections with of Tumbled Travertine patterns.