By Michelle Graff
This 232.08-carat rough diamond Petra Diamonds recovered from Cullinan last month, which is D color, Type IIa, and of “exceptional size and clarity,” was purchased by Diacore for $15.2 million.
London--Diamond cutting and manufacturing firm Diacore paid $15.2 million, or $65,577 a carat, for the 232.08-carat white diamond recovered from the Cullinan mine earlier this year.

London-based Petra Diamonds Ltd. found the stone in September and, upon its recovery, revealed that it was a D color, Type IIa diamond. Type IIa diamonds have no measurable nitrogen impurities, which means colorless type IIas are of both high color and clarity; this stone is so clear that it resembles an ice cube.  

It is one of a number of large pieces of rough uncovered this year, which has been particularly fruitful for big diamond finds.

In a release issued Friday announcing the sale, Petra CEO Johan Dippenaar described the stone as an “outstanding example of the very high-quality large diamonds produced at Cullinan,” a mine that also produced 29- and 122-carat blue diamonds just this year. 

Diacore, which has offices all over the world, has cut a number of exceptional high-profile stones including the 59.60 fancy vivid, oval-cut “Pink Star” and the “De Beers Millennium Star,” a 203.04-carat pear-shaped, D color flawless diamond. 

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