World’s most expensive diamond - $71M

The winning bid came from Hong Kong Jewelry Firm Chow Tai Fook and was ultimately purchased by the company’s Chairman – Henry Cheng Kar-Shum. The diamond in question is also graded as the largest polished diamond ever by the Gemological Institute of America and is touted as “the new record for any diamond or jewel at auction” by Sotheby’s. Surprisingly enough, this isn’t the first time the exotic rock has been put on sale. Back in 2013, it was sold for a heavy $83 million at an auction in Geneva, but the buyer, New York-based diamond cutter Isaac Wolf, eventually defaulted on the deal, thus letting it lie with Sotheby’s up until its recent sale.

After its first failed sale, Sotheby’s decided to auction the beautiful rock in Hong Kong. The exclusive diamond, which now sits as the most expensive rock to be sold in its category (by surpassing the previous world auction record for a pink diamond — $46.16 million for the 24.78 carat Graff Pink, sold at Sotheby’s in Geneva in 2010) is now renamed as the CTF Pink star in memory of company’s founder by it new owner.

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