The world’s third largest cut diamond, otherwise known as the “Incomparable Diamond,” went on display this weekend at the Royal Ontario Museum. It weighs in at 407.08 carats, has been graded ‘flawless’ by the Gemological Institute of America, is kite shaped and has a beautiful golden yellow color, all of which combine to create its very unique and individual beauty.

It was found as an 890-carat rough diamond by a young girl in the Mbuji-Maya district of the Democratic Republic of Congo in the early 1980s as she played in a pile of rubble from a nearby diamond mine.

The diamond was bought and sold numerous times prior to being acquired by Mr. Samuels and Mr. Glick. Mr. Samuels, a master cutter charged with cutting the diamond, initially hoped to break the record for the largest cut diamond in the world. It was determined, however, that size would be sacrificed for perfect clarity. Following four years of study and cutting, the 407- carat Incomparable Diamond emerged along with fourteen other “satellite” diamonds cut from the one 890-carat rough diamond. Five of these “satellites” are to be exhibited alongside the Incomparable Diamond.

The diamond will be on display until March 22nd of next year as part of the museum’s The Nature of Diamonds engagement. “The Nature of Diamonds,” running from Oct. 25 to March 22, is billed as “the most wide-ranging exhibition ever developed on the allure of diamonds.” It looks at the geologic origins of diamonds, how they are mined, their cultural significance and uses in science and technology.