Thanks,
I should add that after deciding to leave it in the house while working, I told her of a classmate that (the summer before his senior year) jumped off a moving hayrack, catching his class ring on a protruding nail, which removed his ring finger.
That story sealed it for her: no ring while working!
Ha! You posted while I was typing. The guy at my workplace lost his finger when he fell getting off a dozer and his ring caught on the handrail. I have heard of several similar incidents over the years.