A flawless 100-carat emerald cut diamond is the largest cut of its clarity to ever be sold at auction and one of the biggest diamonds in the world. It is to be auctioned at Sotheby’s in New York.

A record for any diamond is $46m for a 24.78-carat emerald-cut pink stone, set at Sotheby’s in 2010. It also set a record for any jewel at auction.