Argyle diamond mine at the Ekati mine, both in Canada. However, Argyle has two to four times the concentration of diamonds (ore grade) of these mines. This makes extraction economically feasible, as mine costs are mostly related to the amount of ore processed, not the amount of diamond extracted. In 2005, Rio Tinto was given the go-ahead to a future expansion project, moving it from an open pit to an underground mine. This plan was postponed; in September 2010 Rio Tinto announced fresh plans to develop an underground mine beneath the existing pit, increasing annual production to 9 million tonnes of ore. The
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