Sotheby’s will hold a series of auctions from the diamond collection of the late Rachel Lambert Mellon – an American horticulturalist, gardener, philanthropist, art and diamond jewelry collector. The jewelry and loose diamonds sale will begin on November 10 with a curated selection of fine art that spans four centuries. Mellon’s diamond jewelry will be auctioned on the evening of November 20, followed by a three-day sale of various fine jewelry pieces from Mellon’s residences. The auctions are estimated to achieve in excess of $100 million.
An important 9.15 carat, VS1 diamond clarity, natural fancy color blue diamond pendant, mounted in platinum, is offered with a presale estimate of $1 million to $1.5 million. Additionally, a 9.75 carat pear shaped fancy vivid blue diamond with internally flawless diamond clarity is priced to sell for between $10 million and $15 million. Of the top jewelry lots, Sotheby’s will offer a gold and diamond necklace featuring a graduated jewelry design, set with 29 old European cut diamonds and weighing approximately 111 carats. Completed with a clasp, set with a round, fancy deep yellow diamond of 4.2 carat, this piece is estimated to sell for between $1.25 million to $1.5 million.
As opposed to colorless loose diamonds, the grading of fancy color diamonds improves as the presence of color becomes stronger. Fancy color diamonds are subject to a different diamond grading, with a unique terminology indicating quality and beauty. The pear shape diamond is a fancy cut that is a variation of the traditional round cut diamond, combining the marquise cut with the oval cut. This diamond shape has good proportions that refracts light well and is best suited to be set off in a pendant or a pair of diamond earrings. It is also a commonly used when creating custom jewelry such as unique engagement rings.