Abstract: A monument marker is formed with a clear plastic outer laminate and an inner concrete core. The space between the outer laminate and the core is filled with urethane foam to accommodate expansion and contraction of the concrete core. The outer laminate is formed in either one or two pieces by casting or blow molding. After curing of the outer laminate, the concrete core is positioned centrally of the laminate shell in spaced relationship to the shell walls. The space between the core and the walls is then filled with an expandable liquid such as urethane foam. As the liquid expands it will completely fill the space in the shell and provide an area of rigid yet yieldable material capable of responding to contraction and expansion of the concrete. Indicia presenting a name or message may be secured inside the clear plastic laminate before filling with the expandable liquid. The expanded material is trimmed to present a smooth base and a sheet of plastic may be secured to seal the shell.