Ghana’s diamond output dropped 48.7 percent to 86,924 carats from 143,000 carats, a year earlier, according to data from the Ghana Chamber of Mines seen by Reuters.
The country's diamond production had been on a downward trajectory as the 143,005 carats recorded in 2016 was a 25.8 percent drop compared with 185,376 carats realised in 2015.
Ghana Chamber of Mines said last year that a move by Accra to curb small-scale mining, which was causing damage to the environment, would cause a low diamond and gold output.
The government of President Nana Akufo-Addo, who took office in January 2017, provisionally banned artisanal mining in a renewed effort to clamp down on those who do it illegally.
The country’s diamonds were mainly extracted by small-scale mines.
Meanwhile, Reuters said Ghana’s gold output leaped 10.2 percent to 2.805 million ounces in 2017.
Total gold revenues reached $3.52 billion in 2017, up from $3.25 billion the year before.
Ghana was Africa’s second largest gold producer after South Africa.