Measure and plan the installation. Most granite tiles come in 12-by-12-inch squares, approximately 3/8-inch thick. Be sure and determine the placement of all your tiles then measure around the corners of your lazy Susan. It can be helpful to create a life-size “plan” on a piece of butcher or Kraft paper to determine placement of the tiles and the exact shape you will need to cut to accommodate your lazy Susan.
Mark the needed cuts on the granite tiles that border your lazy Susan with a grease pencil.
Set the marked tiles onto a piece of scrap board to cut. Secure the scrap board to your work table, if necessary, with C-clamps to prevent shifting as you cut.
Fill the reservoir of a wet saw with water, following the manufacturer’s directions. Put on safety goggles, plug in the wet saw then line up the saw’s blade with your grease line. Turn on the saw, allow the water to flow over the blade then push the saw gently, following the line, to cut.
Wipe away any leftover grease marks from the tiles then turn off and unplug the saw.
Remove the lazy Susan’s tray, if possible, and set it aside.
Use a putty knife to spread a layer of cement-based thinset over the area where the tiles will be installed. Use the paper “map,” if you made one, as a guide for placing the tiles into the thinset, fitting the cut tiles around your lazy Susan.
Clean off the putty knife and allow the tiles to set in the thinset overnight.
Fill the gaps between tiles with stone grout, pushing it deeply into any gaps with the putty knife. Wipe away any excess grout from the granite surface with a damp rag and allow the grout to dry.