Here is how we did : 3 mm thick 15 mm wide strip of solid copper, a groove milled lengthwise, a strip of brass soldered into this groove.
Then rounded with a file, smoothed and polished. Bent into shape, then polished shiny.
Solid look. Classic. Pure copper on Your skin.
Same copper Bracelet comes with two magnets as well, go for the magnetic bracelet Nr 1071M >Aiolos<