11. Jacqueline Kennedy Onassis – $2.6 Million
Greek billionaire, Aristotle Onassis proposed to Jacqueline Kennedy with this sensational $2.6 million engagement ring.
The ring was made by Harry Winston and features a 40.42-carat marquise-cut diamond.
It’s truly out of this world and well deserved of its place amongst the most expensive engagement rings in the world.