I made the Ring you see by printing it, making a mold and then pooring it out of metal.
It also will work by just printing, but the metal finish, which is polished, looks a lot nicer.
On an SLA or a DLP Printer this will probably be printed best, since it is so small and fragile, otherwise you will have to use a small nozzle, support materials and 100% infill. Be sure to print it slowly.
For a nice finish I would recomend using a temperature regulated soldering iron to melt some plastic and make the surface nicer. Depending on print materials used you can also use acetone.