"But you know I'm allergic to silver, right?"

"You are?"

"Christ."

"I..."

This was the beginning of the end. It wasn't the minute risk of the silver causing me harm; there are myriad ways to seal silver, and short of ingesting it I'd be fine. It was more that we'd been in a relationship for years and my talk of a silver allergy had gone completely unregistered. There had been cracks appearing in the relationship for a while now, and despite the implication of this grand gesture, there was no silver bullet, or ring for that matter, which could fix that.

edit:

I thought I'd add this: here's a story not written in response to the prompt, but it is thematically consistent with the conceit.

Thought ya'll might enjoy a long read given the subject matter of the prompt.