To make it I started out by cutting 3 nickels in half and rough shaping six petals. I soldered the petals in a stack and filed them to the same shape. I then de-soldered the stack, used a paper clip to emboss, and filed the edges round.
I cut the Primer side off a bullet shell and then filed it round. I soldered it all together to include a metal circle on the back for reinforcement. I used a heat gun to set the crystal. After polishing I made a jump ring from a paper clip.
(Use an expended cartridge. That means a shell that has already been shot. Do not under any circumstances use live ammo.)