Sotheby's plans to auction the famous "Pink Star" diamond an internally flawless, fancy vivid pink stone at its sale in Hong Kong on April 4.
The 59.6 ct Vivid Pink diamond is expected to sell for more than $60 million.
The Pink Star could become the most expensive diamond ever auctioned, when it comes up for sale next month.
"The extraordinary size of this 59.60-carat diamond, paired with its richness of colour, surpasses any known pink diamond recorded in history," said David Bennett, worldwide chairman of Sotheby's Jewellery division.
Originally named the Steinmetz pink, the diamond was recovered at a mine in South Africa.
Sotheby's financial statements have valued the stone at $72 million as part of its inventory.