Series 3: Four-piece Italian Botticino Marble Display Coasters. These heavy marble slabs have high-def Iconic 9/11 Museum images printed on them for a one-of-a-kind display piece. Series 3 features 'The World Trade Center Cross' - 'Bernard the WTC Bear' - 'Ground Zero Bible Page' and 'Today is 11 Subway Calendar Page'. Each tile measures 4 in. x 4 in. Each tile has natural imperfections that come with real Italian marble. For a limited time, the corked bottom of each set has one coaster hand-autographed by the Official Photographer at Ground Zero. Presented in a beautiful gift box.