I found a recent negative article in USA Today http://www.findarticles.com/p/articles/mi_m1272/is_2706_132/ai_114740983 about the supply of diamonds that claims among other things that De Beers [...] can fly in a diamond from Africa, and, within a day, legally arrange for it to be given papers identifying it as Canadian. This makes me wonder if people who buy Canadian diamonds as a guarrantee do be conflict free are in fact being tricked. Do you believe the author is exaggerating, or there is some grain of truth in what he is saying? It seems Canadian mining is really betting of the validity of Canadian certification, and would be hurt if the certificate looses its trustworthiness.