Apprentices, what next?

You might call them artisans as that is a noble job description. 

What’s wrong with calling them the professional title from where
they live?

Here in Oz, “Trade Jeweller”, or just simply “Jeweller” are the
terms used. There are specilisations, like “Setter”, “Engraver” etc.

Regards Charles A.

"Join us to celebrate the Ascension of Apprentice X as she joins
our family as a capable Goldsmith in full." 

Willis – just as long as everyone is clear that the apprentice is
still alive. But I still like it too.