And the metal is actually not 3D printed. How it works is the design is printed in wax first, this wax is then used to make a plaster mould into which the molten metal is cast.
No, you'll want an SLA printer rather than FDM. Something like an Elegoo Mars.
Though there's a bit of an issue going on in that space right now where the company that makes the controller boards for the affordable consumer models has decided to DRM lock their file format and require all of these printers to use their proprietary slicer (Chitubox), locking out the generally better liked open source alternative (Lychee).
If that's an issue for you, you might be able to find an older model that hasn't been updated to recent firmware, but personally I'm waiting on any resin printers until we see how this shakes out. There was some noise about Chitu hearing the community and creating an SDK, but Lychee didn't sound very excited about it.
EDIT - actually it looks like someone has created a lost wax casting filament for FDM printers. Look for "MoldLay". But in terms of printing detail, for small jewelry type projects resin printers are still going to be the better choice.
