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 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.