Engineers in Canada wear "iron" rings that are meant to be representative of this responsibility[0]. While not actually true, most of the time people talk about it they claim the rings were originally made from a failed beam of the first Quebec Bridge[1], improperly engineered.
My wife has three pieces of jewelry- engagement ring, wedding ring, iron ring. She doesn't tell me which one she loves best.
I had thought it was a North American thing, if not a worldwide thing. Canadian speaking. Goes to show that it's easy to assume the world is the same everywhere.
American Universities with engineering departments have an Order of the Engineer ceremony and I recall some people got rings I think. It's been a few years though.
My wife has three pieces of jewelry- engagement ring, wedding ring, iron ring. She doesn't tell me which one she loves best.
[0]https://en.m.wikipedia.org/wiki/Iron_Ring [1]https://en.m.wikipedia.org/wiki/Quebec_Bridge