The breathtaking "pink star" diamond could fetch more than $60 million at auction in Hong Kong next month, but before then Sotheby's is giving spectators in London a glimpse at the 59.60-carat rock.
The pink diamond is the largest Internally Flawless Fancy Vivid Pink diamond ever graded by the Gemological Institute of America (GIA), the auction house said, yet the sparkling stone is still small enough to fit onto a ring. Its estimate is more than $60 million.
"The extraordinary size of this 59.60-carat diamond, paired with its richness of color, surpasses any known pink diamond recorded in history", said David Bennett, worldwide chairman of Sotheby's Jewellery division.
Sotheby's said that the diamond was the most valuable polished diamond ever offered at auction, and if it sells for the expected amount will be the most expensive diamond of its kind ever sold.
In 2016 Sotheby's auctioned off a pear-shaped diamond for $31.5 million (R499 million at the time).
The most expensive diamond ever to be sold at auction is the Oppenheimer Blue, which was bought for £35 million at Christie's auction house in Geneva a year ago. The company said it was the original owner of the 132.50-carat rough diamond that created the Pink Star.