Dominion Diamond Corp.'s production in the first fiscal quarter of 2015 saw mixed results from its Ekati and Diavik diamond mines in Canada's Northwest Territories. For the quarter ended April 30, the Ekati mine had an output of 804,000 carats, an improvement over the 561,000 carats produced the previous year. This was due to higher productivity at the Koala pipes that offset the impact of "unusually extreme winter conditions" that affected surface mining activities. Meanwhile, production at Diavik decreased to 604,000 carats from 734,000 carats. Combined sales from Ekati and Diavik increased to US$187.7 million from US$175.5 million a year ago.