Incomparable Diamond

Wednesday, July 1, 2009


In 1970, Louis Glick acquired the 890 carats (180 g) rough and 407.48 carats (81.50 g) cut Incomparable Diamond, at that time the world's fourth largest rough diamond.[1] The principal 407 carats (81 g) stone remains the third largest gem-quality faceted diamond in the world.
Alternate sources claim that this stone was only discovered in the early 1980s in the town of Mbuji Mayi in the Democratic Republic of Congo, by a young girl playing outside her uncle's house, where rubble from a nearby diamond mine had been dumped.[2]
The stone was cut by a team led by Marvin Samuels, who co-owned the stone along with Donald Zale of Zales Jewellers and Louis Glick. In November 1984 the finished stones were put on display: a single golden diamond of 407.48 carats (81.50 g) in a 'triolette' shape, and fourteen additional gems. Notably, the satellite stones cut from the Incomparable varied greatly in colour, from near-colourless to rich yellow-brown.

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