I made this using a hex bolt, wire, sheet metal, and a cubic zirconium stone. Everything came from the hardware store with the exception of the stone. I got that from Target.
It’s a Christmas gift for my wife. Hope she likes it.
Step 1: Turn a hex bolt
Using a lathe, cut the sides off a hex bolt. Refine the shape with a hobby file. Next drill a hole in the head of the bolt as close to the size of the stone your setting. Once that’s done flip the bolt around and cut the threads clean off.
If necessary use a hobby file to expand the hole until the stone fits in.