ISBN   0-7506-3173-2 . http://books.google.com/?id=Jm3FwBiHaI4C&pg=PA37 .   ^ "The Diamond Industry" . http://www.photius.com/diamonds/the_diamond_industry.html . Retrieved 2009-07-07 .   ^ Adiga, A. (2004-04-12). "Uncommon Brilliance" . Time . http://www.time.com/time/magazine/article/0,9171,501040419-610100,00.html . Retrieved 2008-11-03 .   ^ Mankiw, N. G (1998). Principles of microeconomics . Elsevier. p. 305. ISBN   0-03-024502-8 . http://books.google.com/?id=xoztFMavGCcC&pg=PA305 . "A