Average Jones w/Direct link technology (A Mystery Classic)

"There's been no quarrel. We're as much engaged now as ever, in spite of the return of the ring. It's only her infern--her deep-rooted superstition that's caused this trouble. One can't blame her; her father and mother were both killed in an accident after some sort of 'ghostly warning.' The first thing I gave her, after our engagement, was a necklace of these stones"--he tapped his scarf pin--"that I'd selected, one by one, myself. They're beautiful, as you see, but they're not particularly valuable; only semiprecious.