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
The Diamond Mine (short story) 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. Her marriage to Jerome Brown