Argyle diamond mine of tunnelling, the Argyle underground block cave development was officially completed. In 2013, Argyle is estimated to produce 10.2 million carats with an average per carat price of $25/carat. The Argyle diamond mine is also notable for being the first successful commercial diamond mine exploiting a volcanic pipe of lamproite, rather than the more usual kimberlite pipe; much earlier attempts to mine diamonds from a lamproite pipe in Arkansas, USA were commercially unsuccessful. The Argyle mine is owned by the Rio Tinto Group, a diversified mining company which also owns the Diavik Diamond Mine in Canada and the Murowa Diamond
Luarica diamond mine Luarica diamond mine The Luarica diamond mine is a diamond mine located in Angola. The mine is owned by a consortium of diamond mining companies, the two largest holders being Endiama with 38 percent ownership and Trans Hex with 32 percent ownership. In 2004, the Luarica mine produced about 95,000 carats (19 kg) of diamond from over 632,000 cubic meters of ore processed. 84,000 carats (16.8 kg) of the production was sold in 2004, at an average price of over US$300 per carat (1500 $/g), a new high mark for Angolan diamond production. Probable reserves are 1.3 million cubic meters