RAPAPORT... Rough prices jumped at Petra Diamonds’ sixth tender of the year as demand increased.The June sale realized $93 million, up 8% from $86.1 million in May, the miner reported last week. Like-for-like prices rose 8%. The average price climbed 21% month on month to $163 per carat, according to Rapaport calculations. The growth came even as Petra did not sell any special stones during the Ju...
