The two Stone Fancy Vivid Blue Diamond Ring Could Fetch $8 million At Christie’s New York Auction A “twin stone” fancy vivid blue diamond ring of 3.06 and 2.61 carats with an estimate of $6 million to $8 million is the top lot of Christie’s New York Magnificent Jewels sale. The April 16 auction at Christie’s Rockefeller Center headquarters will also feature three D colored diamonds of more than 15-carats, including a 16.69 carat marquise cut diamond ring Type IIa, and potentially internally flawless, from The Collection of Elizabeth Stafford with an estimate of $1.2 million to $1.8 million. Colored diamonds will be represented with a 6.11 carat fancy pink diamond ring estimate $1.2 million to $1.5 million, fancy deep yellow diamond earrings of 7.55 and 7.51 carats estimate $700,000 to $1 million, a 37.65 carat fancy intense yellow diamond ring estimate $600,000 to $800,000 and a 35.06 carat fancy intense yellow diamond pendant of estimate $500,000 to $700,000.