There are many techniques for finishing the surface of a granite memorial.  This is often determined by the type and color of granite as well as the memorial design. 

Polished Finish - Abrasives are rubbed on the surface of the stone with high-speed polishing wheels to create a polished surface

Sawed, Steeled, Frosted - This matte finish is created by sawing the surface.  It may also be accomplished by sandblasting the surface with steel shot, or by frosting it with sandblast sand.

Polished Margin - The surface is polished and a panel area is frosted, making a place for lettering.

 Shell Rock - This is a hewn surface with hewn sides.  This also referred to as Rock Pitch when seen on the sides of a monument.