 The first authenticated diamonds to be found in Botswana were three small stones discovered in 1959 by the Central African Selection Trust in gravels in the Motloutse River near Foley Siding.The team that found the diamonds examined the river up to its headwaters, but found no likely source.In 2004, geologist Leon Daniels identified a warp in the earth's crust stretching from Bulawayo in Zimbabwe to the south of Botswana.