Granite tile s are edged the same way as ceramics. A field tile is cut to the width of the countertop 's edge, then capped off by an overhanging bullnose granite tile on top. A tile with a bullnose has one of the four edges rounded over, giving it a smooth, finished look. You can't buy bullnose tiles; they are milled specifically for each granite tile installation. Certain companies specialize in grinding and polishing granite tile bullnose edges.
Instructions as follows:
                                                                  
Firstly, measure the front facing edge of the. Mark the measurement on a standard granite tile and cut it, using a tile cutting saw.
Secondly, hold the cut tile in place with the non-dominant hand and use a ruler to measure from the side of the granite tile already set in thinset--second row back, on the countertop to the front edge of the tile being held in place. Write down the measurement.
Thirdly, lay a bullnose tile on a work surface and mark off the measurement, starting at the front edge of the bullnose. Add an extra 1/8 inch. This is to allow for the mortar that will be applied to the back of the tile already cut.
Fourthly, cut the bullnose granite tile.
Fifthly, apply modified thinset mortar for granite on the countertop, using the trowel. Comb notches through the mortar, using the notched edged of the trowel. Apply mortar to the back of the tile strip to be glued to the front facing edge. Don't notch this mortar.
Sixthly, set the bullnose tile on the countertop, making sure it butts up tightly to any adjoining granite tiles. Granite tile installations do not have grout lines. Press the strip of tile to the edge of the countertop.