The Finsch Mine is an underground diamond mine, located near Lime Acres, 160km northwest of Kimberley, South Africa. Finsch Mine is one of seven operations managed by De Beers Consolidated Mines (DBCM), formed in July 2004 as the wholly owned South African mining subsidiary of Luxembourg-based DB Investments / De Beers SA. Underground development began in 1978 and the shaft was commissioned in 1982. 
Run-of-mine ore is crushed and screened, while –18mm and –3mm material is processed separately. Dense-medium separation is used for the coarser ore, while the fine material is processed through a pan plant and by high-intensity magnetic separation. The concentrates are retreated in cyclones to reduce the volume further, then combined and dried to form the feed for X-ray fluorescence sorting to recover the diamonds. Tailings are passed over grease belts to retain any residual stones. Between February 2005 and end-September 2006, the engineering firm, Bateman, carried out a major upgrade of the technology, also increasing the feed rate to the plant to 900t/h.