After the untimely death of the former President of the United States John F Kennedy, the former First Lady of the United States – Jackie Kennedy- was proposed to one of the richest men in the world at that time- Aristotle Onassis. Her second wedding ring was a 40.42-carat, emerald-cut, white diamonds ring. After her death, the ring was auctioned in 1996 for $2,600,000, as per reports.
Full Story Source: 5 most expensive wedding rings in the world
