A large blue diamond has been found in a South African mine which experts believe could reach up to £30m at auction.

CINCINNATI (CNN Newsource/WKRC) - An extremely rare blue diamond sold at an auction in Geneva on Tuesday. It sold for nearly $44 million, making it the most expensive diamond sold at auction this year ...

The latest blue diamond to hit the auction block certainly lives up to its namesake. The 10.03-carat Mediterranean Blue gem will be the crown jewel at Sotheby’s High Jewelry Auction this May, on sale ...

An exceptionally rare blue gem became one of the most expensive diamonds sold by Christie’s when it went under the hammer in Geneva on Tuesday. An unidentified buyer paid CHF 39,505 million (US$43.8 ...

One of the most valuable blue diamonds to ever feature at an auction could sell for more than $48 million, according to Sotheby’s. Named “The De Beers Cullinan Blue,” it is the biggest vivid blue ...

Discover the top 5 rarest diamonds in the world. Learn what makes these gemstones so unique, valuable, and extraordinary, ...

Breakthroughs, discoveries, and DIY tips sent six days a week. Terms of Service and Privacy Policy. The industry term for naturally colored stones is “fancy ...

The 17.61-carat “Bleu Royal,” the largest internally flawless fancy vivid blue gem to ever appear at auction. Its estimate is $35 million - $50 million. The always popular fall Geneva jewelry auctions ...