Diamond production has decreased by 62.4 percent at South Africa, during May 2009, when compared to the same month last year. But in comparison to diamond production in April 2009, the May figures indicate only a 1 percent drop. Diamond production showed an increase of 1.9 percent in the quarter ending May 31, when compared to the previous quarter. %% Production of gold also showed a decline of 10.5 percent in May 2009 as compared to the same month last year, while the entire mineral production was lower by 14.5 percent.