The oval mixed-cut diamond smashed the USD 60 million pre-sale estimate set by Sotheby's when it went on the block.
The sale comes three years after the gem was sold at an even higher price at another Sotheby's auction in Geneva. That deal later fell apart after the buyer defaulted.
The gem is the largest flawless fancy vivid pink diamond ever graded by the Gemological Institute of America.
Sotheby's Asia Chairwoman Patti Wong said the winning bidder is Hong Kong jeweler Chow Tai Fook "We're very happy," Wong said. "I know there was a lot of talk about the economy in China not being as positive as it was a few years ago," but the results from its jewelry auction Tuesday, which included nearly 200 other lots, were very strong, she said.
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"We're very, very confident that all three bidders had the financial capability, and of course the buyer definitely had the financial capability," she said.
Until now, the most expensive diamond ever sold at auction was the "Oppenheimer Blue," which fetched 56.8 million Swiss francs (then USD 57.6 million) last May. The previous world auction record for a pink diamond was USD 46.2 million for the 24.78 carat "Graff Pink" in 2010.
Sotheby's decided the time was right to bring the diamond back to the market because of rising demand from wealthy Asian buyers.
The "Pink Star" was mined in Africa by De Beers in 1999 as a raw 132.5 carat gem and cut over a two-year period. In November 2013 it was auctioned for a record USD 83 million to New York diamond cutter Isaac Wolf, who failed to pay.
The auction house was then forced to buy the diamond itself because had guaranteed a USD 60 million sale price. Last year it sold an unspecified stake in the diamond, valued at $72 million on its balance sheet, to two companies, diamond specialist Diacore and New York jeweler Mellen Inc.