Although Jay-Z and Beyonce got married in a secret ceremony in April, her ring remained unseen until she took a walk on a Miami beach with her younger sister Solange last weekend.
The ring is believed to be from the celebrity jewelers, Schwartz and experts believe it would have cost around $5 million.
Mohammed Cimark, who runs 'Precious Gems and Jewels' in London, said, "If it is 18 carats then it's a lovely size, an exceptional diamond. It's clearly a premium stone. huge octagon-cut diamond was a rarity. You can't recognize the color from the photo and the clarity is hard to see, but the best clarity is internally flawless".
The jeweler said he believed the stone had been sourced from Africa and added "Most diamonds this size you would get in South Africa or Sierra Leone. That's where you get the biggest diamonds"
Jay-Z, whose is real name Shawn Carter reportedly earned $80 million last year from his live performances and album sales, as well as his many other ventures, including a hotel and clothing range so a $5 million price tag would not have made too big a dent in his bank account.
