Christie’s is set to auction off an ultra-rare 14.6-carat blue Oppenheimer Diamond that is expected to sell for between $35 million and $45 million.
It was owned by Philip Oppenheimer, the late chairman of the De Beers diamond-marketing cartel.
In the diamond world, blue is one of the rarest and most sought-after colors. Kadakia said that less than 2 percent of diamonds discovered in the world are blue.
The rock will be the largest fancy vivid blue diamond ever sold at auction and is a so-called rectangular cut — among the most prized in the diamond world.
Blue diamonds are also the most expensive on a per-carat price. The 12.03-carat “Blue Moon Diamond” was sold by Sotheby’s in November for $48.5 million, setting a new record of $4 million per carat.
If the Oppenheimer sells for the same per-carat price it would fetch more than $58 million.
The stone will be sold at Christie’s Geneva Magnificent Jewels sale on May 18.
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