A friend of mine had an art studio at the Nicholas Building, and I got to speak with a jeweller who told me that he still did a lot of bespoke work in wedding rings, especially for tradies who would otherwise wear down store-bought rings because they were solid gold and therefore softer. I don't remember the details, but he specialised in harder alloys that are nevertheless mostly gold, and therefore "good as gold" for a wedding ring.

Would that be your partner?