Not everyone can afford a 10-carat marquise diamond such as the one Michael Douglas proposed to Catherine Zeta-Jones when he asked her to marry him. What makes their engagement ring different is the marquise setting, which is positioned on its side than length wise. I am sure Catherines engagement ring is not easy to wear, because of the size of the diamond, but Michael sure hit a home run with this glamorous setting! With a smaller size diamond, it would be one of the uniquest settings for a engagement ring. The couple's fairy-tale wedding was held in November of the year 2000 which hosted over 350 guests and cost more than $1.5 million. The famous jewellery designer Fred Leighton, lent to her a Edwardian tiara which also featured delicate marquise-cut diamonds in a curved design.