(IDEX Online) - Mountain Province saw revenue from the Gahcho Kue mine, in Canada, slide by 41 per cent during Q2, down from $76m to $44.6m (all figures are US dollars).The Toronto-based miner, a 49 per cent joint venture partner with De Beers, said the quarterly figures were skewed because it held three sales in Q1, rather the normal two.Average price carat dipped slightly from $130 in Q2 2022 to $124 in Q2 2023 and volumes were down 38 per cent form 587,000 carat to 360,000 carats.Earnings from mine operations was down from $38.2m to $38.2m and adjusted earnings (EBITDA) were down from $41m to $22.8m, according the company's second quarter financial results.Mark Wall, president and CEO, said costs had increased due to waste stripping - along-term investment - together with one-off maintenance costs and a five-day shutdown."Considering the points above our 2023 guidance remains unchanged, with production trending to the mid/lower end and production costs trending to the mid/upper end of the range," he said.Pic shows the processing plant at Gahcho Kue