Rough resources at Lucapa Diamond Company’s Lulo deposit in Angola increased 48% in 2023 as the miner identified new material that will add an extra eight years to the deposit’s production. The figure, which refers to the volume of diamonds with a reasonable prospect of being extracted economically, climbed to 228,000 carats as of December 31, from 153,870 carats a year earlier, the company said Monday. The miner had the asset independently estimated by South