Engraving a design on a gold or silver ring

[SteveC]

Hi,
I really like the antique thin gold momento mori rings that show a skeleton on a black enamel background, with the skeleton running around the ring.
How could I make one?
Does it entail hand engraving with hand tools or a dremel or can it be done by etching in some way.
Would it be very difficult to make?

I've attached a screenshot of the type of ring.

Any thoughts gratefully received.

Best Regards
Steve