The country of Botswana in Africa is the biggest producer of diamond in the world by value. The second and third top producers are Russia and Canada, respectively. It is interesting to note that Canada is the third largest producer of diamonds.The Top Diamond Producing Countries: An estimated 65% of the world’s diamonds come from African countries according to the Diamond Facts site. Some of the Top Diamond Mining Companies are: De BeersRio TintoAlrosaHarry Winston DiamondBHP BillitonPetra DiamondsGem DiamondsSource: The ‘Blood Diamond’ Resurfaces, The Wall Street Journal----------------------Diamond Price GuideIf you're on a very tight...