Making a three stone diamond engagement ring.

Step 13 Cutting the prong channels.

Use the fine circular needle file to cut the channels for the prongs to sit in.

Depending on the thickness of the wax wire you are using for the prongs use the appropriate section of the file to cut the channels.

For the center stone seat, it is a good idea to flatten off the square edges (to create a octagonal oblong) before attempting to cut the channels for the prongs. This will stop the file slipping and make it easier to locate the channels properly.