The Ultimate 100 carat Internally Flawless Emerald Cut Diamond expected to fetch $25M at auction. 

Sotheby’s unveiled a diamond unlike any other offered before it. The exceedingly rare 100.20 carat, internally flawless, D colour, perfect emerald cut diamond will go on sale today at Sotheby’s New York, and is expected to fetch in the region of $19 – 25 million.

"This 100.20-carat diamond is the definition of perfection. The colour is whiter than white. It is free of any internal imperfections," Sotheby's New York jewellery department head Gary Schuler said in a statement, likening its transparency "to a pool of icy water."

The diamond was mined in South Africa and weighed over 200 carats in its rough form. It took over a year of planning and decision making before arriving at this miracle of nature, displaying the pure masterpiece of human skill and artistry.