Beyonce and Jay-Z are a great couple with timeless taste. The two are inseparable and seem happier then ever. Beyonce clearly adores her hubby and her 18 carat flawless emerald-cut diamond ring worth over $5 million. The emerald-cut diamond is not a new cut. It dates back more than 100 years. Take a look at one of our vintage treasures. This 1.45 carat emerald-cut diamond ring is a stunning piece. A ring showcasing the beauty of the Art Deco era.