Trade Secret of the Day Sometimes it is difficult to see where the
stone’s pavilion is hitting the inside of the crown. To help in
determining where the stone touches the crown, dust the inside of the
crown with talcum powder. Then, carefully place the stone in the
crown and press down gently. Carefully lift the stone from the crown
and examine the pavilion. Powder will remain on the stone at the
points of contact with the crown, allowing you to know where extra
metal needs to be removed before setting the stone.