NAVONA is a travertine which was one of the most widely used kinds of marble in ancient buildings in Roman Times and has continued to influence the work of artists and architects through to the modern and contemporary era. Comes in a cross section look and horizontal cuts Natural & Anti-Slip finishes are available and 6mm, 9mm and 20mm thicknesses four indoor/outdoor continuity. Semi-Polished , Natural & Anti-Slip finishes are available and 6mm, 9mm and 20mm thicknesses four indoor/outdoor continuity.