The diamond was found in 2016 and then weighed 200 carats.
Now it has been cut and polished down to the 101 carat diamond that is now for sale.
The stone is estimated to be sold for 20 million dollars according to the auction company Christie's, so of course not everyone can buy such an expensive gemstone.
Hear gemmologist Jan Asplund explain who might buy the diamond in the video above.