World's Biggest Fancy Vivid Blue Diamond Expected To Fetch More Than $19 Million (PHOTO)

The World's Largest Round Fancy Vivid Blue Diamond

A rare 7.59 carat diamond -- the world's largest in the Fancy Vivid blue category -- will likely fetch more than $19 million in an auction this coming October, according to a formal announcement release by Sotheby's. Talk about a major rock.

Check out a photo of the stone:

fancy blue

Sotheby's will auction "The Premier Blue," as it's been dubbed, on Oct. 7 in Hong Kong as part of a 40th anniversary event, according to Sotheby's. The "brilliant-cut internally flawless" diamond is the largest round Fancy Vivid to ever be graded by the Gemological Institute of America. No diamond of this size or kind has ever been auctioned worldwide, according to Sotheby's.

Sotheby's currently holds the record for highest per-carat price for any Fancy Vivid sold at auction, with the 6.01 carat diamond that fetched $1,686,505 per carat in 2011. If sold at the expected price of $19 million, “The Premier Blue" Fancy Vivid would achieve a new world record.

Prior to the auction, a viewing of the diamond will be held in various locations in Asia, Geneva, London, New York and Doha. A photo call of the diamond will be held next Wednesday, September 4, at 10 a.m. at Sotheby's New York.

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