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
The Diamond Mine (short story) artist's relationship with her family. The Diamond Mine (short story) "The Diamond Mine" is a short story by Willa Cather. It was first published in "McClure's" in October 1916. Aboard a ship, Cressida Garnet, a soprano, meets a cousin of her late first husband's. She tells him of her love affair with Blasius Bouchalka, a Bohemian violinist who was her second husband. After he had an affair with their maid, Ruzenka, she filed for divorce and never saw him again. She is now set to marry Jerome Brown, a financier. Later, we learn that Cressida died on the RMS Titanic.