Rough diamonds from Rio Tinto's Diavik mine
Australian miner Rio Tinto's rough diamond production in the first half of the year reached 8.3 million carats, down 10 percent from the same period in 2018.
According to the company, production at its Argyle mine saw a year-on-year 13 percent decline during the period in review due to lower recovered grade. This was partly offset by stronger mining rates.
At the Diavik mine, output dropped by 1 percent, with lower recovered grades partially offset by higher ore processing throughput.
Rio Tinto set its diamond production guidance for 2019 between 15 and 17 million carats.