Petra Diamonds’ rough prices decreased at its latest tender as it noted seasonal weakness across all size categories. The sixth trading session, which took place in May, brought in $44 million from the sale of 371,104 carats, while like-for-like prices slipped 2.6% versus April, the miner reported last week. The sales value was down 11% from April’s $49 million but up 4.8% from the equivalent tender in May 2023. Sales volume increased 2% from April
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