NEW YORK, March 29 (UPI) -- Sotheby's is set to auction an emerald-cut, 100.2-carat diamond worth an estimated $19 to $25 million on April 21 in New York City.
It is labeled as an internally flawless with no measurable nitrogen impurities. The diamond was originally more than 200 carats when it was sourced from a mine in southern Africa. The current owner spent more than a year working on the gem to present it in its current form.