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
Diamond Mine (video game) Diamond Mine (video game) Diamond Mine is a video game first published by MRM Software for the Acorn Electron and BBC Micro home computers in 1984. It was reissued by Blue Ribbon in 1985 and ported to other systems in 1985 and 1986. Blue Ribbon also released a sequel Diamond Mine II at the same time. Both games are similar to the 1982 arcade game "Anteater". While the maze design, limited pipe length and non-stop movement make the first game more original, "Diamond Mine II" could be considered an "Anteater" clone. The aim of the game is to guide a