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 Boy Is Mine (song) the Gibson Amphitheatre on September 10, 1998, an event which remains, to date, Brandy and Monica's only television broadcast performance of the song. The pair came together a second time on December 16, 2008 for a surprise performance at Atlanta’s "V103 Soul Session", singing it a cappella. In 2012, they performed the song with their new duet "It All Belongs To Me" at V-103's "Conversation/Soul Session". The Boy Is Mine (song) "The Boy Is Mine" is a 1998 duet by American singers Brandy and Monica written and composed by LaShawn Daniels, Japhe Tejeda, Fred Jerkins III, Rodney "Darkchild" Jerkins, and