Helen- It is imperative that you cut a good seat for a stone to sit
in. I always tell our setting students that it’s a properly cut seat
that really makes a stone secure. All the prongs in the world will
not make that stone secure if you don’t have a good seat.
I tell my students to think upside down. Look at the bottom of the
stone. Use a burr that is the same angles as the bottom of the
I also always insist that my students de burr the sides of the
prongs where the seat has been cut.
I cut my seat about 40% of the prong width.
Prong setting can be easy breezy once you’ve done a few with proper
setting tools and techniques.
Have fun and make lots of Jewelry.