"Diamonds & Rust" is a 1975 song written and performed by Joan Baez. In the song, Baez recounts an out-of-the-blue phone call from an old lover, which sends her a decade back in time to a seedy hotel in Greenwich Village. She recalls giving him a pair of cuff links, and summarizes that memories bring "diamonds and rust" (time both turns dirty charcoal into beautiful diamonds and shiny metal into ugly rust).
Well I'll be damned
Here comes your ghost again
But that's not unusual
It's just that the moon is full