these children on this picture are sifting mud to get the valuable mineral coltan - not diamonds. I know of only one time where childen were used for diamond mining, and that was during the Taylor terror in Liberia when kids were kidnapped from villages to mine alluvials in Sierre Leone. A lot of kids are also used to mine the Tanzanite from mines in Tanzania however, they are forced to crawl deep into these holes and many drown when it rains. Tanzanite is an incredibly beautiful gemstone.