507-Carat Rough Diamond Found
by Deidre Woollard (RSS feed) Sep 29th 2009 at 10:02PM
It looks like a chunk of clouded ice but the stone shown at right is a 507-carat rough diamond found at the Petra Diamonds Cullinan Mine in South Africa. The 507.55 carat stone is believed to be of exceptional color and clarity, and is most likely a Type II diamond. The rough was found as part of a run that also included a 168-carat piece of rough and two other stones of 58.5 and 53.3 carats. A lucky day indeed, the stone is one of the top 20 largest high-quality rough diamonds ever found making it incredibly rare.
The Cullinan Mine has yielded some of the world's great diamonds including the largest "gem-quality" stone ever recovered, the "Cullinan," 3,106 carats rough, and was the source for the Golden Jubilee, at 755 carats rough, and the Centenary, at 599 carats rough. Cullinan also produced the piece of rough that became the Taylor-Burton diamond, a stone that is 69 carats polished. The diamonds will be analyzed by a team of experts and then the long process of determining how to best cut them can begin.