
LONDON (Reuters) – Petra Diamonds sold a 507-carat diamond for $35.3 million on Friday, breaking a record as the highest price ever paid for a rough diamond. Analysts had estimated the value of the stone, one of the 20 biggest high-quality rough diamonds, at around $25 million. "It is fitting that the Cullinan Heritage should achieve a sale price of $35.3 million, the highest sale price on rec…
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