|Diamond mine in Africa|
The average price per carat Petra achieved declined 19% to $152.03, based on figures the company published in a trading update on Tuesday.
The improved production results include now mining at the Finsch mine in South Africa.
Petra sold 2.1 million carats in the fiscal year, up 77% compared to the previous fiscal year.
The company will be publishing a full year analyst guidance on August 15 and announce its full financial results for the year on September 24.