A 59.6-carat pink diamond named the "Pink Star" is expected to be the most expensive diamond ever auctioned when it goes up for sale next month in Hong Kong. /CFP Photo
Auction house Sotheby’s estimates it could fetch up to 60 million US dollars, breaking the current record for a diamond of 57.5 million US dollars. /CFP Photo
The “Pink Star” will be up for auction on April 4. /CFP Photo