(IDEX Online) - Lucapa saw sales slide by more than a third (36 per cent) during the last quarter, down to $21.8m.At its Lulo deposit (pictured), in Angola - the mine where an historic 170-ct pink diamond was recovered last month - the Australian miner reported a 47 per cent drop in revenue to $15.6m.Meanwhile its smaller mine, Mothae, in Lesotho, saw a 27 per cent increase in revenue to $6.2m. Lucapa said the rough price per carat across both mines had fallen by 42 per cent from Q2 2021 to the same period this year.Managing director Stephen Wetherall said: "Mining operations performed steadily during the quarter, however the inflationary and constrained supply environment impacted on Mothae in the first half. "The second half of the year has started more strongly, and we continue to focus on optimising plant throughputs and reducing costs in the current operating environment."