When trimming the edge of a bezel use a flat graver. Make certain the cutting edge of the graver is perpendicular to the stone. If the cutting edge is held at an angle less than 90 degrees it will have a tendency to cut in toward the stone possibly chipping or abrading it. By keeping the cutting edge of the graver at a 90 degree angle will allow it to glide smoothly around the bezel.
A flat graver can be used to burnish the bezel. Place the graver point on the bezel as you would if cutting. However, pull backwards on the graver to burnish the metal, rather than pushing forward on it.
How to training videos for Bench Jewelers
See some of the most respected Master Jewelers explain their techniques and tips
on stonesetting, making and repairing jewelry.