The Kagem emerald mine in Zambia produced 17.4 million carats of emeralds for Gemfields in the six months ended on June 30, including 85,000 carats of quality emeralds.
This is down from the 18.9 million carats produced in the same period last year.
In addition, 772 000 carats, including 35 760 carats of quality rubies, were mined from the Montepuez ruby mine in Mozambique.
In the same time frame last year, the mine extracted 1.6 million carats of ruby.
For the first nine months of the year, Gemfields reported just below $65 million in income from emerald auctions and $80.4 million in revenue from ruby auctions.
The miner will deliver a comprehensive report in September.
Mathew Nyaungwa, Editor in Chief of the African Bureau, Rough&Polished
