In Pirates of the Caribbean: At World’s End (2007), Captain Teague aka Keith Richards is wearing a silver skull ring. This wasn't a prop made for the movie, it's a real ring that belongs to Keith Richards. He received it for his birthday in 1978 and has worn it ever since.

MovieDetails @Tokyono Source

In Pirates of the Caribbean: At World’s End (2007), Captain Teague aka Keith Richards is wearing a silver skull ring. This wasn't a prop made for the movie, it's a real ring that belongs to Keith Richards. He received it for his birthday in 1978 and has worn it ever since.