In 2013, it sold for a record $83 million at a Sotheby’s auction in Geneva, but the buyer, New York-based diamond cutter Isaac Wolf, defaulted on the deal. The “Pink Star” diamond is the most valuable cut diamond ever offered at auction, one of the world’s great natural treasures, and this is a new record for any diamond or jewel at auction. The Pink Star was mined by De Beers in 1999 in South Africa and weighed 132.5 carat in the rough. It’s the largest “Internally Flawless, Fancy Vivid Pink” diamond ever to be graded by the Geological Institute of America (GIA. As a result of this exceptional rarity, the Steinmetz Group took a cautious 20 months to cut the Pink. It was first unveiled in Monaco on 29 May 2003 in a public ceremony.