The heart design on the top is cold enameled, which sounds posh but its epoxy resin with glitter mixed in!
To make you will need:
Small sheet of copper or brass five inch square should be plenty, about 1mm thick.
Few inches of scrap copper wire. I used old electrical wire and stripped off the plastic.
Leadfree solder & flux.
Fast set epoxy resin. Comes in two tubes.
Bit of red glitter.
Pencil torch or soldering iron.