One of the most famous engagement rings in the world is Princess Diana’s sapphire engagement ring. Making it even more meaningful, Prince William proposed to Kate Middleton with his mother’s 12-carat oval blue sapphire ring. Now Gwyneth Paltrow has joined these beautiful and stylish women by celebrating her recent engagement with a gorgeous sapphire ring. There’s something very special about this choice. It’s perfect for the jewelry lover who appreciates classic style but marches to the beat of her own drum.