When bead or pave setting dust the mounting and stones with cornstarch. This will eliminate the glare, providing a better view of the metal beads and stones. You can make a dusting bag by placing cornstarch in the center of a cloth handkerchief; use enough powder to form a ball about the size of a golf ball. Secure the loose ends with a rubber band; which will serve as a handle. Tapping the ball of powder once or twice against the mounting will provide sufficient powder on the mounting.