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Big Ice

September 24, 2009 was a lucky day in the South African Petra Diamond Cullinan mine when a 507.55 carat rough diamond (above) was found among the rubble. The huge stone–extremely rare and apparently of exceptional color and quality–is one of the top 20 largest high-quality rough diamonds ever found. Amazingly, three other very large rough diamonds were found in the same run at sizes of 168, 58.5 and 53.3 carats each. I particularly love stories about Cullinan because I was lucky enough…

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