Abstract: The two-piece vanity top includes a granite top piece having a sink opening. A sink member having a flange is joined to an undersurface of the granite top piece to align with the sink opening. The sink flange thus extends along the undersurface of the top piece. A plurality of clamping assemblies are bonded to the undersurface of the top-piece without penetrating the top-piece and without threading any fasteners into the granite surface. Each of the clamping assemblies includes an adjustable clamping member that is engageable with the sink flange to force the sink flange against the undersurface of the top-piece.